Perfluorinated cyclopropyl fused 1,3-oxazin-2-amine compounds as beta-secretase inhibitors and methods of use

ABSTRACT

The present invention provides a new class of compounds useful for the modulation of beta-secretase enzyme (BACE) activity. The compounds have a general Formula I: 
     
       
         
         
             
             
         
       
     
     wherein variables A 4 , A 5 , A 6 , A 8 , each of R a , R b , R 1 , R 2 , R 3  and R 7  of Formula I, independently, are defined herein. The invention also provides pharmaceutical compositions comprising the compounds, and uses of the compounds and compositions for treatment of disorders and/or conditions related to A-beta plaque formation and deposition, resulting from the biological activity of BACE. Such BACE mediated disorders include, for example, Alzheimer&#39;s Disease, cognitive deficits, cognitive impairments, schizophrenia and other central nervous system conditions. The invention further provides compounds of Formulas II and III, and sub-formula embodiments thereof, intermediates and methods for preparing compounds of the invention.

RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional PatentApplication Nos. 61/775,380, filed on Mar. 8, 2013 and 61/939,580, filedon Feb. 13, 2014, which specifications are hereby incorporated herein byreference in their entireties.

FIELD OF THE INVENTION

The invention relates generally to pharmaceutically active compounds,pharmaceutical compositions and methods of use thereof, to treatbeta-secretase mediated diseases and conditions, including, withoutlimitation, Alzheimer's disease, plaque formation and associated centralnervous system (CNS) disorders.

BACKGROUND OF THE INVENTION

Alzheimer's disease (AD) affects greater than 12 million aging peopleworldwide, and importantly, the number affected continues to grow. ADaccounts for the majority of dementias clinically diagnosed after theage of 60. AD is generally characterized by the progressive decline ofmemory, reasoning, judgement and orientation. As the disease progresses,motor, sensory, and vocal abilities are affected until there is globalimpairment of multiple cognitive functions. The loss of cognitivefunction occurs gradually, typically leading to a diminished cognitionof self, family and friends. Patients with severe cognitive impairmentand/or diagnosed as end-stage AD are generally bedridden, incontinent,and dependent on custodial care. The AD patient eventually dies in aboutnine to ten years, on average, after initial diagnosis. Due to theincapacitating, generally humiliating and ultimately fatal effects ofAD, there is a need to treat AD effectively upon diagnosis.

AD is characterized by two major physiological changes in the brain. Thefirst change, beta amyloid plaque formation, supports the “amyloidcascade hypothesis” which conveys the thought that AD is caused by theformation of characteristic beta amyloid peptide (A-beta), or A-betafragments thereof, deposits in the brain (commonly referred to as betaamyloid “plaques” or “plaque deposits”) and in cerebral blood vessels(beta amyloid angiopathy). A wealth of evidence suggests thatbeta-amyloid and accompanying amyloid plaque formation is central to thepathophysiology of AD and is likely to play an early role in thisintractable neurodegenerative disorder. Vassar & Yan, Lancet Neurology,13:319-329 (2014). The second change in AD is the formation ofintraneuronal tangles, consisting of an aggregate form of the proteintau. Besides being found in patients with AD, intraneuronal tangles arealso found in other dementia-inducing disorders. Joachim et al., Alz.Dis. Assoc. Dis., 6:7-34 (1992).

Several lines of evidence indicate that progressive cerebral depositionof A-beta plays a seminal role in the pathogenesis of AD and can precedecognitive symptoms by years or even decades. Selkoe, Neuron, 6:487(1991). Release of A-beta from neuronal cells grown in culture and thepresence of A-beta in cerebrospinal fluid (CSF) of both normalindividuals and AD patients has been demonstrated. Seubert et al.,Nature, 359:325-327 (1992). Autopsies of AD patients have revealed largenumbers of lesions comprising these 2 factors in areas of the humanbrain believed to be important for memory and cognition.

Smaller numbers of these lesions in a more restricted anatomicaldistribution are found in the brains of most aged humans who do not haveclinical AD. Amyloid containing plaques and vascular amyloid angiopathywere also found in the brains of individuals with Down's Syndrome,Hereditary Cerebral Hemorrhage with Amyloidosis of the Dutch-type(HCHWA-D), and other neurodegenerative disorders.

It has been hypothesized that A-beta formation is a causative precursoror factor in the development of AD. More specifically, deposition ofA-beta in areas of the brain responsible for cognitive factors isbelieved to be a major factor in the development of AD. Beta amyloidplaques are primarily composed of amyloid beta peptide (A-beta peptide).A-beta peptide is derived from the proteolytic cleavage of a largetransmembrane amyloid precursor protein (APP), and is a peptidecomprised of about 39-42 amino acid residues. A-beta 42 (42 amino acidslong) is thought to be the major component of these plaque deposits inthe brains of Alzheimer's Disease patients. Citron, Trends inPharmacological Sciences, 25(2):92-97 (2004).

Similar plaques appear in some variants of Lewy body dementia and ininclusion body myositis, a muscle disease. Aβ also forms aggregatescoating cerebral blood vessels in cerebral amyloid angiopathy. Theseplaques are composed of a tangle of regularly ordered fibrillaraggregates called amyloid fibers, a protein fold shared by otherpeptides such as prions associated with protein misfolding diseases.Research on laboratory rats suggest that the dimeric, soluble form ofthe peptide is a causative agent in the development of Alzheimer's andis the smallest synaptotoxic species of soluble amyloid beta oligomer.Shankar, G. M., Nature Medicine (Jun. 22, 2008) online doi 10:1038 nm1782.

Several aspartyl proteases, including beta-secretase andgamma-secretase, are thought to be involved in the processing orcleavage of APP, resulting in the formation of A-beta peptide. Betasecretase (BACE, also commonly referred to as memapsin) is thought tofirst cleave APP to generate two fragments: (1) a first N-terminusfragment (beta APP) and (2) a second C-99 fragment, which issubsequently cleaved by gamma secretase to generate the A-beta peptide.APP has also found to be cleaved by alpha-secretase to producealpha-sAPP, a secreted form of APP that does not result in beta-amyloidplaque formation. This alternate pathway precludes the formation ofA-beta peptide. A description of the proteolytic processing fragments ofAPP is found, for example, in U.S. Pat. Nos. 5,441,870, 5,712,130 and5,942,400.

BACE is an aspartyl protease enzyme comprising 501 amino acids andresponsible for processing APP at the beta-secretase specific cleavagesite. BACE is present in two forms, BACE 1 and BACE 2, designated assuch depending upon the specific cleavage site of APP. Beta secretase isdescribed in Sinha et al., Nature, 402:537-554 (1999) (p510) and PCTapplication WO 2000/17369. It has been proposed that A-beta peptideaccumulates as a result of APP processing by BACE. Moreover, in vivoprocessing of APP at the beta secretase cleavage site is thought to be arate-limiting step in A-beta production. Sabbagh, M. et al., Alz. Dis.Rev. 3:1-19 (1997). Thus, inhibition of the BACE enzyme activity isdesirable for the treatment of AD.

Studies have shown that the inhibition of BACE may be linked to thetreatment of AD. The BACE enzyme is essential for the generation ofbeta-amyloid or A-beta. BACE knockout mice do not produce beta-amyloidand are free from Alzheimer's associated pathologies including neuronalloss and certain memory deficits. Cole, S. L., Vasser, R., MolecularDegeneration 2:22, 2007. When crossed with transgenic mice that overexpress APP, the progeny of BACE deficient mice show reduced amounts ofA-beta in brain extracts as compares with control animals (Luo et al.,Nature Neuroscience, 4:231-232 (2001)). The fact that BACE initiates theformation of beta-amyloid, and the observation that BACE levels areelevated in this disease provide direct and compelling reasons todevelop therapies directed at BACE inhibition thus reducing beta-amyloidand its associated toxicities. To this end, inhibition of beta secretaseactivity and a corresponding reduction of A-beta in the brain shouldprovide a therapeutic method for treating AD and other beta amyloid orplaque related disorders.

Consequently, the approach of regulating or reducing the formation ofA-beta peptide formation and deposition as a potential treatment for ADhas received tremendous attention, support and commitment from bothresearchers and investors alike. A small molecule gamma-secretaseinhibitor, LY450139 (“Semagacestat”), an A-beta lowering agent, advancedto phase III clinical trials for the treatment of Alzheimer's Disease.The pharmacokinetics of semagacestat in plasma, as well as the plasmaand cerebral spinal fluid (CSF) A-Beta peptide levels as pharmacodynamicresponses to semagacestat administration were evaluated in healthy humansubjects in single and multiple doses, and pharmacokinetic andpharmacodynamic changes were also assessed in mild to moderate ADpatients in two (2) clinical trials (Expert Opin. Pharmacother. (2009),10 (10); Clin. Neuropharmacol. 2007; 30 (pgs 317-325); and Neurology,2006, 66 (pgs 602-624)).

Additional approaches have been taken in attempts to treat AD andplaque-related disorders. One such approach to reduce the formation ofplaque deposits in the brain involves the inhibition of and, therefore,the reduction of BACE activity. Vassar & Yan, Lancet Neurology,13:319-329 (2014). For example, each of the following PCT publications:WO07/049532, WO12/147763, WO12/107371, WO12/168164, WO12/168175,WO12/156284, WO11/070781, WO11/020806, WO 11/070029, WO11/058763,WO11/071109, WO11/071135, WO11/069934, WO12/139993, WO11/009898,WO2008133273, WO13/142613, WO14/001228, US2009082560 (US equivalent ofWO07/049532), US20100160290 (US equivalent of WO08/133273),US20120238557, US20120245154, US20120245157, US20120202803 (USequivalent of WO12/107371), US20120258962, US20130072478 and EP01942105describe inhibitors of BACE, useful for treating AD and otherbeta-secretase mediated disorders. For Example, US20120245157 describes“Oxazine Derivatives” as BACE inhibitors for the treatment ofneurological disorders of the general formula:

while WO2012168164 describes “Halogen-Alkyl-1,3-Oxazines as BACE1 and/orBACE2 Inhibitors” and discloses compounds of the general formula:

The lysosomal aspartic protease Cathepsin D (CatD) is ubiquitouslyexpressed in eukaryotic organisms. CatD activity is essential toaccomplish the acid-dependent extensive or partial proteolysis ofprotein substrates within endosomal and lysosomal compartments thereindelivered via endocytosis, phagocytosis or autophagocytosis. CatD mayalso act at physiological pH on small-size substrates in the cytosol andin the extracellular milieu. Mouse and fruit fly CatD knock-out modelshave highlighted the multi-pathophysiological roles of CatD in tissuehomeostasis and organ development.

Inhibition of protein Cathepsin D has been implicated in undesirableside effects. For instance, the inhibition of Cathepsin D is believed tobe linked to adverse retinal development and retinal atrophy.Particularly, in mice it was found that cathepsin D is essential for themetabolic maintenance of retinal photoreceptor cells and that itsdeficiency induces apoptosis of the cells, while the loss of INL neuronsis mediated by nitrc oxide release from microglial cells. However, inthe very same mice, it was also found that no atrophic change wasdetected in the retina of mice deficient in cathepsin B or L. Mol. Cell.Neurosci, 2003, Feb. 22(2):146-161. Further, Animal models of cathepsinD (CatD) deficiency are characterized by a progressive and relentlessneurodegenerative phenotype similar to that observed in Neuronal CeroidLipofuscinoses (NCL), a group of pediatric neurodegenerative diseasesknown collectively as Batten Disease. It has been shown that thetargeted deletion of the pro-apoptotic molecule Bax prevents apoptoticmarkers but not neuronal cell death and neurodegeneration induced byCatD deficiency, which suggests that alterations in themacroautophagy-lysosomal degradation pathway can mediate neuronal celldeath in NCL/Batten Disease in the absence of apoptosis. Autophagy,2007, September-October; 3(5):474-476. Finally, an adverse effect of theinhibition of Cat D is evident from the data presented in PLoS One,2011; 6(7):e21908, published Jul. 1, 2011. The authors of the PLoS Onepaper found that knock-down of cathepsin D affects the retinal pigmentepithelium, impairs swim-bladder ontogenesis and causes premature deathin zebrafish. The main phenotypic alterations produced by CatDknock-down in zebrafish were: 1. abnormal development of the eye and ofretinal pigment epithelium; 2. absence of the swim-bladder; 3. skinhyper-pigmentation; 4. reduced growth and premature death. Rescueexperiments confirmed the involvement of CatD in the developmentalprocesses leading to these phenotypic alterations.

Moreover, such toxicity findings which, in view of the literature, mayhave played a role in the termination of a human Bace-mediatedAlzheimer's Disease clinical trial. Eli Lilly terminated a phase Iclinical trial of LY 2811376 after rat toxicology studies showed that ahigher compound dose given for three months damaged the pigmentepithelium of the rat's eye. The retinal layer had inclusions andextensive damage. The Ph I dosing trial was terminated and peoplebrought in for eye assessments did not show any abnormalities(Alzheimer's Research Forum News, Mar. 31, 2011 reporting on MartinCitron's presentation at the AD/PD Conference 3-2011 in Barcelona,Spain)

Hence, it is desirable to provide compounds which modulate the activityof and are reasonably selective for BACE, while not suffering fromundesirable side effects possibly due to intervention with or thereduction and/or direct or indirect inhibition of the expression and/orfunction of other proteins or biological pathways.

BRIEF DESCRIPTION OF THE INVENTION

The present invention provides a new class of compounds useful for themodulation of beta secretase activity, and as treatment of AD.Particularly, the compounds of the invention are useful for theregulation or reduction of the formation of A-beta peptide and,consequently, the regulation and/or reduction of formation of betaamyloid plaque both on the brain, as well as in the CNS. To this end,the compounds are useful for the treatment of AD and other betasecretase and/or plaque-related and/or mediated disorders. For example,the compounds are useful for the prophylaxis and/or treatment, acuteand/or chronic, of AD and other diseases or conditions involving thedeposition or accumulation of beta amyloid peptide, and formation ofplaque, on the brain.

The compounds provided by the invention, including stereoisomers,tautomers, hydrates, solvates and pharmaceutically acceptable saltsthereof, are generally defined by Formula I

wherein each of A⁴, A⁵, A⁶, A⁸, R^(a), R^(b), R¹, R², R³ and R⁷ ofFormula I are defined below. The invention also provides procedures formaking compounds of Formula I, and sub-Formulas thereof, as well asintermediates useful in such procedures.

The invention further provides pharmaceutical compositions comprisingcompounds of the invention, and uses of these compositions in thetreatment of beta secretase mediated diseases. For example, and in oneembodiment, the invention provides a pharmaceutical compositioncomprising an effective dosage amount of a compound of Formula I inassociation with at least one pharmaceutically acceptable excipient.

The foregoing merely summarizes certain aspects of the invention and isnot intended, nor should it be construed, as limiting the invention inany way. All patents and other publications recited herein are herebyincorporated by reference in their entirety.

DETAILED DESCRIPTION OF THE INVENTION

In embodiment 1 of the invention, there are provided compounds,including stereoisomers, tautomers, hydrates, solvates andpharmaceutically acceptable salts thereof, which are generally definedby Formula I:

or a stereoisomer, tautomer, hydrate, solvate or pharmaceuticallyacceptable salt thereof, wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than two of A⁴, A⁵, A⁶ and A⁸ isN;

each of R^(a) and R^(b), independently, is H, F, Cl, C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl,—S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each ofthe C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of—CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and—C(O)C₁₋₆-alkyl are optionally substituted with 1-4 substituents of F,oxo or OH;

each of R¹ and R², independently, is H, F, Cl, C₁₋₆-alkyl, C₂₋₄alkenyl,C₂₋₄ alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl,—NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each of the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of —CH₂OC₁₋₆-alkyl,—OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and —C(O)C₁₋₆-alkyl areoptionally substituted with 1-4 substituents of F, oxo or OH;

R³ is C₁₋₄alkyl, CH₂OC₁₋₄alkyl, CH₂OH, C₁₋₄haloalkyl or cyclopropyl,wherein each of the C₁₋₄alkyl, CH₂OC₁₋₄alkyl, C₁₋₄haloalkyl andcyclopropyl is optionally substituted with 1-4 F atoms;

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, halo, haloalkyl,haloalkoxyl, C₁₋₄-alkyl, CN, OH, OC₁₋₄-alkyl, S(O)_(o)C₁₋₄-alkyl,NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl;

R⁷ is —NH—R⁹, —NH—C(═O)—R⁹, —C(═O)NH—R⁹, —O—R⁹ or —S—R⁹; R⁹ is acetyl,C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or a fully or partially unsaturated3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9- or 10-memberedbicyclic ring formed of carbon atoms, said ring optionally including 1-4heteroatoms if monocyclic or 1-5 heteroatoms if bicyclic, saidheteroatoms selected from O, N or S, wherein the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionally substituted,independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl,

provided the compound is not

-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-methoxy-1,7-naphthyridin-8-amine    or-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide.

In embodiment 2, the invention provides compounds according toembodiment 1, or a stereoisomer or pharmaceutically acceptable saltthereof, wherein each of R¹ and R², independently, is H, F, CH₃, CH₂F,CHF₂ or CF₃.

In embodiment 3, the invention provides compounds according to any oneof embodiments 1 and 2, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each of R^(a) and R^(b), independently, is H, F,CH₃, CH₂F, CHF₂ or CF₃.

In embodiment 4, the invention provides compounds according to any oneof embodiments 1, 2 and 3, or a stereoisomer or pharmaceuticallyacceptable salt thereof, wherein each of R¹ and R², independently, is H,F or CF₃.

In embodiment 5, the invention provides compounds according to any oneof embodiments 1-4, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each of R^(a) and R^(b), independently, is H or F.

In embodiment 6, the invention provides compounds according to any oneof embodiments 1-5, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each of R¹ and R², independently, is H, F or CF₃;and each of R^(a) and R^(b), independently, is H or F.

In embodiment 7, the invention provides compounds according to any oneof embodiments 1-6, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each of R¹, R², R^(a) and R^(b), independently, isH.

In embodiment 8, the invention provides compounds according to any oneof embodiments 1-7, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₃, CF₃, CH₂F or CHF₂.

In embodiment 9, the invention provides compounds according to any oneof embodiments 1-8, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁷ is —NH—CH₂—R⁹ or —NH—C(═O)—R⁹;

or R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N.

In embodiment 10, the invention provides compounds according to any oneof embodiments 1 and 9, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than one of A⁴, A⁵, A⁶ and A⁸ isN;

each of R^(a) and R^(b), independently, is H, F, Cl, CF₃, OCF₃, methyl,ethyl, CN, OH, OCH₃, SCH₃, NHCH₃, C(O)CH₃ or CH₂OCHF₂;

each of R¹ and R², independently, is H, F, Cl, CF₃, OCF₃, methyl, ethyl,CN, OH, OCH₃, SCH₃, NHCH₃, C(O)CH₃ or CH₂OCHF₂;

R³ is C₁₋₄alkyl, C₁₋₄haloalkyl, CH₂OH, CH₂OCHF₂ or cyclopropyl; and

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl, CF₂H, CH₂F, CF₃,OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃.

In embodiment 11, the invention provides compounds according to any oneof embodiments 1-9, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein

each of R¹ and R², independently, is H, F or CF₃;

each of R^(a) and R^(b), independently, is H or F;

R³ is CH₃, CF₃, CH₂F or CHF₂; and

R⁷ is —NH—R⁹, —NH—C(═O)—R⁹ or

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N.

In embodiment 12, the invention provides compounds according to any oneof embodiments 1-11, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁷ is —NH—C(═O)—R⁹.

In embodiment 13, the invention provides compounds according to any oneof embodiments 1-11, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N.

In embodiment 14, the invention provides compounds according to any oneof embodiments 1-13, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein

A⁴ is CR⁴;

A⁵ is CR⁵ or N;

A⁶ is CR⁶; and

A⁸ is CR⁸ or N, provided only one of A⁵ and A⁸ is N, and wherein each ofR⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl, CF₃, CF₂H, CH₂F or CH₃.

In embodiment 15, the invention provides compounds, includingstereoisomers, tautomers, hydrates, solvates and pharmaceuticallyacceptable salts thereof, which are generally defined by Formula I:

or a stereoisomer, tautomer, hydrate, solvate or pharmaceuticallyacceptable salt thereof, wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than one of A⁴, A⁵, A⁶ and A⁸ isN;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

R³ is C₁₋₄alkyl, CH₂OC₁₋₄alkyl, CH₂OH, C₁₋₄haloalkyl or cyclopropyl,wherein each of the C₁₋₄alkyl, CH₂OC₁₋₄alkyl, C₁₋₄haloalkyl andcyclopropyl is optionally substituted with 1-4 F atoms;

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, halo, haloalkyl,haloalkoxyl, C₁₋₄-alkyl, CN, OH, OC₁₋₄-alkyl, S(O)_(o)C₁₋₄-alkyl,NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl;

R⁷ is —NH—R⁹ or —NH—C(═O)—R⁹;

or R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N;

R⁹ is acetyl, C₁₋₆-alkyl, C₂ alkenyl, C₂₋₄alkynyl or a fully orpartially unsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9-or 10-membered bicyclic ring formed of carbon atoms, said ringoptionally including 1-4 heteroatoms if monocyclic or 1-5 heteroatoms ifbicyclic, said heteroatoms selected from O, N or S, wherein theC₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃ dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl,

provided the compound is not

-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-methoxy-1,7-naphthyridin-8-amine    or-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide.

In embodiment 16, the invention provides compounds, includingstereoisomers, tautomers, hydrates, solvates and pharmaceuticallyacceptable salts thereof, which are generally defined by Formula II:

wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than two of A⁴, A⁵, A⁶ and A⁸ isN;

each of R^(a) and R^(b), independently, is H, F, Cl, C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl,—S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each ofthe C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of—CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and—C(O)C₁₋₆-alkyl are optionally substituted with 1-4 substituents of F,oxo or OH;

each of R¹ and R², independently, is H, F, Cl, C₁₋₆-alkyl, C₂₋₄alkenyl,C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl,—NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each of the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of —CH₂OC₁₋₆-alkyl,—OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and —C(O)C₁₋₆-alkyl areoptionally substituted with 1-4 substituents of F, oxo or OH;

R³ is C₁₋₄alkyl, CH₂OC₁₋₄alkyl, CH₂OH, C₁₋₄haloalkyl or cyclopropyl,wherein each of the C₁₋₄alkyl, CH₂OC₁₋₄alkyl, C₁₋₄haloalkyl andcyclopropyl is optionally substituted with 1-4 F atoms;

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, halo, haloalkyl,haloalkoxyl, C₁₋₄-alkyl, CN, OH, OC₁₋₄-alkyl, S(O)_(o)C₁₋₄-alkyl,NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl;

R⁷ is —NH—R⁹, —NH—C(═O)—R⁹, —C(═O)NH—R⁹;

or R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N;

R⁹ is acetyl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or a fully orpartially unsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9-or 10-membered bicyclic ring formed of carbon atoms, said ringoptionally including 1-4 heteroatoms if monocyclic or 1-5 heteroatoms ifbicyclic, said heteroatoms selected from O, N or S, wherein theC₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 17, the invention provides compounds according any one ofembodiments 1 and 16, or a stereoisomer, tautomer or pharmaceuticallyacceptable salt thereof, wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided no more than one of A⁴, A⁵, A⁶ and A⁸ is N;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

R³ is C₁₋₄alkyl, C₁₋₄haloalkyl, CH₂OH, CH₂OCHF₂ or cyclopropyl; and

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl, CF₂H, CH₂F, CF₃,OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃.

In embodiment 18, the invention provides compounds according to any oneof embodiments 1-6, 7 and 16-17, or a stereoisomer or pharmaceuticallyacceptable salt thereof, wherein

A⁴ is CR⁴;

A⁵ is CR⁵;

A⁶ is CR⁶; and

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,CF₃, CF₂H, CH₂F or CH₃;

R³ is CH₃, CF₃, CH₂F or CHF₂; and

R⁷ is —NH—C(═O)—R⁹ or

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl or N.

In embodiment 19, the invention provides compounds according to any oneof embodiments 16-17, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁷ is —NH—C(═O)—R⁹.

In embodiment 20, the invention provides compounds according to any oneof embodiments 16-18, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N.

In embodiment 21, the invention provides compounds according to any oneof embodiments 16-20, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each of R¹ and R², independently, is H, F or CF₃;and each of R^(a) and R^(b), independently, is H or F.

In embodiment 22, the invention provides compounds according to any oneof embodiments 1-12, or a stereoisomer or pharmaceutically acceptablesalt thereof, having a Formula I-A

wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than one of A⁴, A⁵, A⁶ and A⁸ isN;

each of R^(a) and R^(b), independently, is H, F, Cl, C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl,—S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each ofthe C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of—CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and—C(O)C₁₋₆-alkyl are optionally substituted with 1-4 substituents of F,oxo or OH;

each of R¹ and R², independently, is H, F, Cl, C₁₋₆-alkyl, C₂₋₄alkenyl,C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl,—NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each of the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of —CH₂OC₁₋₆-alkyl,—OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and —C(O)C₁₋₆-alkyl areoptionally substituted with 1-4 substituents of F, oxo or OH;

R³ is C₁₋₄alkyl, CH₂OC₁₋₄alkyl, CH₂OH, C₁₋₄haloalkyl or cyclopropyl,wherein each of the C₁₋₄alkyl, CH₂OC₁₋₄alkyl, C₁₋₄haloalkyl andcyclopropyl is optionally substituted with 1-4 F atoms;

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl or CH₃;

R⁹ is acetyl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or a fully orpartially unsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9-or 10-membered bicyclic ring formed of carbon atoms, said ringoptionally including 1-4 heteroatoms if monocyclic or 1-5 heteroatoms ifbicyclic, said heteroatoms selected from O, N or S, wherein theC₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆ alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 23, the invention provides compounds according to any oneof embodiments 1-3, 8-20 and 22, or a stereoisomer, tautomer orpharmaceutically acceptable salt thereof, wherein

A⁴ is CR⁴;

A⁵ is CR⁵;

A⁶ is CR⁶;

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,Cl, CF₂H, CH₂F, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ orC(O)CH₃;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

R³ is CH₃, C₂H₅, CF₂H or CH₂F;

R⁹ is acetyl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or a fully orpartially unsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9-or 10-membered bicyclic ring formed of carbon atoms, said ringoptionally including 1-4 heteroatoms if monocyclic or 1-5 heteroatoms ifbicyclic, said heteroatoms selected from O, N or S, wherein theC₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆ alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 24, the invention provides compounds according to any oneof embodiments 1-19 and 22-23, or a stereoisomer or pharmaceuticallyacceptable salt thereof, wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H,F, Cl or CH₃, provided no more than one of A⁴, A⁵, A⁶ and A⁸ is N;

each of R¹, R², R^(a) and R^(b), independently, is H; and

R³ is CF₃, CH₃, CF₂H or CH₂F.

In embodiment 25, the invention provides compounds according to any oneof embodiments 1-12, 16-19 and 22-24, or a stereoisomer orpharmaceutically acceptable salt thereof, having a Formula II-A

wherein

A⁴ is CR⁴, wherein R⁴ is H, F or Cl;

A⁵ is CR⁵ or N, wherein R⁵ is H, F, Cl or CH₃;

A⁶ is CH;

A⁸ is CR⁸ or N, wherein R⁸ is H or F, provided that no more than one ofA⁵ and A⁸ is N;

each of R^(a) and R^(b), independently, is H or F;

each of R¹ and R², independently, is H or F;

R³ is CH₃, CF₃, CH₂F or CHF₂;

R⁹ is a fully unsaturated 5- or 6-membered monocyclic or 8-, 9- or10-membered bicyclic ring formed of carbon atoms, said ring optionallyincluding 1-4 heteroatoms if monocyclic or 1-5 heteroatoms if bicyclic,said heteroatoms selected from O, N or S, wherein the ring is optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 26, the invention provides compounds according toembodiment 25, or a stereoisomer or pharmaceutically acceptable saltthereof, wherein each of R^(a), R^(b), R¹ and R², independently, is H.

In embodiment 27, the invention provides compounds according ng any oneof embodiments 25 and 26, or a stereoisomer or pharmaceuticallyacceptable salt thereof, wherein R³ is CH₃, CH₂F or CHF₂.

In embodiment 28, the invention provides compounds according to any oneof embodiments 25-27, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F or CHF₂.

In embodiment 29, the invention provides compounds according to any oneof embodiments 25-28, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F.

In embodiment 30, the invention provides compounds according to any oneof embodiments 25-28, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂.

In embodiment 31, the invention provides compounds according to any oneof embodiments 25-30, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁴ is CF or CCl;

A⁵ is CH, CF, CH₃ or N;

A⁶ is CH; and

A⁸ is CH.

In embodiment 32, the invention provides compounds according to any oneof embodiments 25-31, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁴ is CF;

A⁵ is CH, CF or N;

A⁶ is CH; and

A⁸ is CH.

In embodiment 33, the invention provides compounds according to any oneof embodiments 25-31, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁴ is CCl;

A⁵ is CH or CF;

A⁶ is CH; and

A⁸ is CH.

In embodiment 34, the invention provides compounds according to any oneof embodiments 25-33, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein

R⁹ is a ring selected from phenyl, pyridyl, pyrimidyl, pyrazinyl,pyridazinyl, pyrazolyl, pyrazolo[3,4-c]pyridinyl, oxazolyl, isoxazolyl,thiazolyl, isothiazolyl or thienyl, wherein the ring is optionallysubstituted with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 35, the invention provides compounds according to any oneof embodiments 25-33, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁹ is a ring selected from pyridyl, pyrimidyl,pyrazinyl, pyridazinyl, pyrazolyl, pyrazolo[3,4-c]pyridinyl, oxazolyl,isoxazolyl, thiazolyl, isothiazolyl or thienyl, wherein the ring isoptionally substituted with 1-5 substituents of R¹⁰.

In embodiment 36, the invention provides compounds according to any oneof embodiments 25-35 or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CF₃, CHF₂, CH₂F, CN, OH,—C(O)NHCH₃, cyclopropylmethoxy, 2-propynyloxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆ alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkoxyl orC₁₋₆thioalkoxyl, wherein each of the cyclopropylmethoxy, 2-propynyloxy,2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl,C₁₋₆alkoxyl and C₁₋₆thioalkoxyl is optionally substituted independentlywith 1-5 substituents of F, Cl, CN, NO₂, NH₂, OH, oxo, CF₃, CHF₂, CH₂F,methyl, methoxy, ethyl, ethoxy, CH₂CF₃, CH₂CHF₂, propyl, propoxy,isopropyl, isopropoxy, cyclopropyl, butyl, butoxyl, cyclobutyl,isobutoxy, tert-butoxy, isobutyl, sec-butyl, tert-butyl,C₁₋₃alkylamino-, C₁₋₃dialkylamino, C₁₋₃thioalkoxyl, oxazolyl orthiazolyl.

In embodiment 37, the invention provides compounds according to any oneof embodiments 25-36, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 38, the invention provides compounds according to any oneof embodiments 25-36, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 39, the invention provides compounds according to any oneof embodiments 25-36, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 40, the invention provides compounds according to any oneof embodiments 25-36, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 41, the invention provides compounds according to any oneof embodiments 1-11, 13-18 and 20-21, or a stereoisomer, tautomer,hydrate, solvate or pharmaceutically acceptable salt thereof, having aFormula II-B:

wherein

A⁴ is CR⁴, wherein R⁴ is H, F or Cl;

A⁵ is CR⁵ or N, wherein R⁵ is H, F, Cl or CH₃;

A⁶ is CH;

A⁸ is CR⁸ or N, wherein R⁸ is H or F,

provided that no more than one of A⁵ and A⁸ is N;

each of R^(a) and R^(b), independently, is H or F;

each of R¹ and R², independently, is H or F;

R³ is CH₃, CF₃, CH₂F or CHF₂;

R⁹ is a fully unsaturated 5- or 6-membered monocyclic or 8-, 9- or10-membered bicyclic ring formed of carbon atoms, said ring optionallyincluding 1-4 heteroatoms if monocyclic or 1-5 heteroatoms if bicyclic,said heteroatoms selected from O, N or S, wherein the ring is optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl; and

each W, independently, is CH, CF, CCl, CCH₃ or N.

In embodiment 42, the invention provides compounds according toembodiment 40, or a stereoisomer or pharmaceutically acceptable saltthereof, wherein each of R^(a), R^(b), R¹ and R², independently, is H.

In embodiment 43, the invention provides compounds according to any oneof embodiments 41 and 42, or a stereoisomer or pharmaceuticallyacceptable salt thereof, wherein R³ is CH₃, CH₂F or CHF₂.

In embodiment 44, the invention provides compounds according to any oneof embodiments 41-43, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F or CHF₂.

In embodiment 45, the invention provides compounds according to any oneof embodiments 41-44, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F.

In embodiment 46, the invention provides compounds according to any oneof embodiments 41-44, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂.

In embodiment 47, the invention provides compounds according to any oneof embodiments 41-46, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁴ is CF or CCl; A⁵ is CH, CF, CH₃ or N;

A⁶ is CH; and

A⁸ is CH.

In embodiment 48, the invention provides compounds according to any oneof embodiments 41-47, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁴ is CF;

A⁵ is CH, CF or N;

A⁶ is CH; and

A⁸ is CH.

In embodiment 49, the invention provides compounds according to any oneof embodiments 41-47, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁴ is CCl;

A⁵ is CH or CF;

A⁶ is CH; and

A⁸ is CH.

In embodiment 50, the invention provides compounds according to any oneof embodiments 41-49 or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 51, the invention provides compounds, includingstereoisomers, tautomers, hydrates, solvates and pharmaceuticallyacceptable salts thereof, which are generally defined by Formula III:

wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than two of A⁴, A⁵, A⁶ and A⁸ isN;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

R³ is CH₃, CF₃, CH₂F or CHF₂;

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl or CH₃;

R⁷ is —NH—C(═O)—R⁹, or

R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N;

R⁹ is a ring selected from phenyl, pyridyl, pyrimidyl, pyrazinyl,pyridazinyl, pyrazolyl, pyrazolo[3,4-c]pyridinyl, oxazolyl, isoxazolyl,thiazolyl, isothiazolyl or thienyl, wherein the ring is optionallysubstituted with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 52, the invention provides compounds includingstereoisomers, tautomers, hydrates, solvates and pharmaceuticallyacceptable salts thereof, according to embodiment 51, which aregenerally defined by Formula III-A:

wherein

A⁴ is CR⁴, wherein R⁴ is H, F or Cl;

A⁵ is CR⁵ or N, wherein R⁵ is H, F, Cl or CH₃;

A⁶ is CH;

A⁸ is CR⁸ or N, wherein R⁸ is H or F, provided that no more than one ofA⁵ and A⁸ is N;

each of R^(a) and R^(b), independently, is H or F;

each of R¹ and R², independently, is H or F;

R³ is CH₃, CH₂F or CHF₂;

R⁹ is a ring selected from phenyl, pyridyl, pyrimidyl, pyrazinyl,pyrazolyl, pyrazolo[3,4-c]pyridinyl, oxazolyl, isoxazolyl, thiazolyl,isothiazolyl or thienyl, wherein the ring is optionally substituted with1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆ alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 53, the invention provides compounds according to any oneof embodiments 51-52 or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CF₃, CHF₂, CH₂F, CN, OH,—C(O)NHCH₃, cyclopropylmethoxy, 2-propynyloxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkoxyl orC₁₋₆thioalkoxyl, wherein each of the cyclopropylmethoxy, 2-propynyloxy,2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl,C₁₋₆alkoxyl and C₁₋₆thioalkoxyl is optionally substituted independentlywith 1-5 substituents of F, Cl, CN, NO₂, NH₂, OH, oxo, CF₃, CHF₂, CH₂F,methyl, methoxy, ethyl, ethoxy, CH₂CF₃, CH₂CHF₂, propyl, propoxy,isopropyl, isopropoxy, cyclopropyl, butyl, butoxyl, cyclobutyl,isobutoxy, tert-butoxy, isobutyl, sec-butyl, tert-butyl,C₁₋₃alkylamino-, C₁₋₃dialkylamino, C₁₋₃thioalkoxyl, oxazolyl orthiazolyl.

In embodiment 54, the invention provides compounds according to any oneof embodiments 51-53, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 55, the invention provides compounds according to any oneof embodiments 51-53, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 56, the invention provides compounds according to any oneof embodiments 51-53 or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 57, the invention provides compounds according to any oneof embodiments 51-53, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F; and R⁹ is

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 58, the invention provides compounds, includingstereoisomers, tautomers, hydrates, solvates and pharmaceuticallyacceptable salts thereof, which are generally defined by Formula III-B:

wherein

A⁴ is CR⁴, wherein R⁴ is H, F or Cl;

A⁵ is CR⁵ or N, wherein R⁵ is H, F, Cl or CH₃;

A⁶ is CH;

A⁸ is CR⁸ or N, wherein R⁸ is H or F, provided that no more than one ofA⁵ and A⁸ is N;

each of R^(a) and R^(b), independently, is H or F;

each of R¹ and R², independently, is H or F;

R³ is CH₃, CH₂F or CHF₂;

and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 59, the invention provides compounds of formula III-A-1,or a pharmaceutically acceptable salt or tautomer thereof,

wherein, A⁴ is CF;

A⁵ is CH, CF, CCl, CCH₃ or N;

A⁶ is CH;

A⁸ is CH or N, provided that no more than one of A⁵ and A⁸ is N;

each of R^(a) and R^(b), independently, is H;

each of R¹ and R², independently, is H or F;

R³ is CH₃, CH₂F or CHF₂;

W is CR¹⁰ or N; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In embodiment 60, the invention provides compounds of formula III-A-2,or a pharmaceutically acceptable salt or tautomer thereof,

wherein

A⁴ is CF or CCl;

A⁵ is CH, CF, CCl, CCH₃ or N;

A⁸ is CH or N, provided no more than one of A⁵ and A⁸ is N;

R³ is CH₃, CH₂F or CHF₂;

W is CH or N; and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy; 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 61, the invention provides compounds according to any oneof embodiments 59-60, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CHF₂.

In embodiment 62, the invention provides compounds according to any oneof embodiments 59-60, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein R³ is CH₂F.

In embodiment 63, the invention provides compounds according to any oneof embodiments 59-62, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein W is CH.

In embodiment 64, the invention provides compounds according to any oneof embodiments 59-62, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein W is N.

In embodiment 65, the invention provides compounds according to any oneof embodiments 59-64, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each R¹⁰, independently, is H, F, Cl, Br, CH₃,CHF₂, CH₂F, CN, 2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein theC₁₋₂alkoxyl is optionally substituted independently with 1-5substituents of F, oxazolyl or thiazolyl.

In embodiment 66, the invention provides compounds according to any oneof embodiments 59-65, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each R¹⁰, independently, is H, F, Cl, Br, CH₃,CHF₂, CH₂F, CN, 2-propynyloxy, 2-butynyloxy, —OCHF₂ or —OCH₃.

In embodiment 67, the invention provides compounds according to any oneof embodiments 59-66, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁸ is CH.

In embodiment 68, the invention provides compounds according to any oneof embodiments 59-67, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH, CF, CCl, CCH₃ or N.

In embodiment 68, the invention provides compounds according to any oneof embodiments 59-67, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH, CF, CCH₃ or N.

In embodiment 68, the invention provides compounds according to any oneof embodiments 59-67, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH or N.

In embodiment 69, the invention provides compounds of formula III-A-3,or a pharmaceutically acceptable salt or tautomer thereof,

wherein

A⁵ is CH, CF, CCl, CCH₃ or N;

R³ is CH₃, CH₂F or CHF₂;

W is CH or N; and

each R¹⁰, independently, is H, F, Cl, Br, CH₃, CHF₂, CH₂F, CN,2-propynyloxy; 2-butynyloxy or C₁₋₂alkoxyl, wherein the C₁₋₂alkoxyl isoptionally substituted independently with 1-5 substituents of F, Cl,methyl, methoxy, ethyl, ethoxy, oxazolyl or thiazolyl.

In embodiment 70, the invention provides compounds according to any oneof embodiment 69, or a stereoisomer or pharmaceutically acceptable saltthereof, wherein R³ is CHF₂.

In embodiment 71, the invention provides compounds according to any oneof embodiment 69, or a stereoisomer or pharmaceutically acceptable saltthereof, wherein R³ is CH₂F.

In embodiment 72, the invention provides compounds according to any oneof embodiments 69-71, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein W is CH.

In embodiment 73, the invention provides compounds according to any oneof embodiments 69-71, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein W is N.

In embodiment 74, the invention provides compounds according to any oneof embodiments 69-74, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each R¹⁰, independently, is H, F, Cl, Br, CH₃,CHF₂, CH₂F, CN, 2-propynyloxy, 2-butynyloxy or C₁₋₂alkoxyl, wherein theC₁₋₂alkoxyl is optionally substituted independently with 1-5substituents of F, oxazolyl or thiazolyl.

In embodiment 75, the invention provides compounds according to any oneof embodiments 69-75, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein each R¹⁰, independently, is H, F, Cl, Br, CH₃,CHF₂, CH₂F, CN, 2-propynyloxy, 2-butynyloxy, —OCHF₂ or —OCH₃.

In embodiment 77, the invention provides compounds according to any oneof embodiments 69-76, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH, CF, CCH₃ or N.

In embodiment 78, the invention provides compounds according to any oneof embodiments 69-77, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH, CF or N.

In embodiment 79, the invention provides compounds according to any oneof embodiments 69-78, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH or N.

In embodiment 80, the invention provides compounds according to any oneof embodiments 69-79, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is CH.

In embodiment 81, the invention provides compounds according to any oneof embodiments 69-79, or a stereoisomer or pharmaceutically acceptablesalt thereof, wherein A⁵ is N.

Similarly, the invention provides compounds of sub-formulas III-C, III-Eand III-F, respectively, as described below.

in conjunction with any of the above or below embodiments, includingthose described in embodiments A, A-1 to A-4, B, B-1 to B-10, C, C-1 toC-10, D, D-1 to D-4, E, E-1 to E-4, F, F-1 to F-4, G, G-1 to G-4, H, H-1to H-4, I, I-1 to 1-9, J, J-1 to J-8, K, K-1 to K-2, L, M, N-1 to N-2,O-1 to O-2, P-1 to P-2, Q and Q-1 to Q-2 described herein.

The present invention contemplates that the various differentembodiments of Formulas I, II and III, and sub-Formulas I-A, I-B, I-Cand III-A throughout III-F thereof, described herein, may comprise thefollowing embodiments with respect to individual variables of A⁴, A⁵,A⁶, A⁸, R¹, R², R³, R⁷, V and W, where applicable, as described below.Hence, these embodiments with respect to individual variables A⁴, A⁵,A⁶, A⁸, R¹, R², R³, R⁷, V and W where applicable, may be applied “inconjunction with any of the other {above and below} embodiments” tocreate various embodiments of general Formulas I, II and III, and eachsub-formula thereof, which are not literally or identically describedherein. More specifically, the term “in conjunction with any of theabove or below embodiments” includes embodiments A, A-1 to A-4, B, B-1to B10, C, C-1 to C-10, D, D-1 to D-4, E, E-1 to E-4, F, F-1 to F-4, G,G-1 to G-4, H, H-1 to H-4, I, I-1 to 1-9, J, J-1 to J-9, K, K-1 to K-2,L, M, N-1 to N-2, O-1 to O-2, P-1 to P-2, Q and Q-1 to Q-2 describedherein, as it applies to general Formulas I, II and III, andsub-formulas I-A, I-B and I-C and III-A through III-F, also describedherein.

In another embodiment A, the invention includes compounds wherein eachof R^(a) and R^(b), independently, is H, F, Cl, C₁₋₆-alkyl, C₂₋₄alkenyl,C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl,—NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl, wherein each of the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkyl portion of —CH₂OC₁₋₆-alkyl,—OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl and —C(O)C₁₋₆-alkyl areoptionally substituted with 1-4 substituents of F, oxo or OH, inconjunction with any of the above or below embodiments.

In another embodiment A-1, the invention includes compounds wherein eachof R^(a) and R^(b), independently, is H, F, Cl, CF₃, OCF₃, methyl,ethyl, CN, OH, OCH₃, SCH₃, NHCH₃, C(O)CH₃ or CH₂OCHF₂, in conjunctionwith any of the above or below embodiments.

In another embodiment A-2, the invention includes compounds wherein eachof R^(a) and R^(b), independently, is H, F, CF₃, CH₃, CF₂H or CH₂F, inconjunction with any of the above or below embodiments.

In another embodiment A-3, the invention includes compounds wherein R¹is H or F, in conjunction with any of the above or below embodiments.

In another embodiment A-4, the invention includes compounds wherein R¹is H, in conjunction with any of the above or below embodiments.

In another embodiment B, the invention includes compounds wherein R¹ isH, F, Cl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl,—OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl,wherein each of the C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkylportion of —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl,—NHC₁₋₆-alkyl and —C(O)C₁₋₆-alkyl are optionally substituted with 1-4substituents of F, oxo or OH, in conjunction with any of the above orbelow embodiments.

In another embodiment B-1, the invention includes compounds wherein R¹is H, F, Cl, C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₃-alkyl,—OC₁₋₃-alkyl, wherein each of the C₂₋₄alkenyl, C₂₋₄alkynyl andC₁₋₃-alkyl portion of —CH₂OC₁₋₃-alkyl and —OC₁₋₃-alkyl are optionallysubstituted with 1-4 substituents of F, in conjunction with any of theabove or below embodiments.

In another embodiment B-2, the invention includes compounds wherein R¹is H, F, Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃,C(O)CH₃ or CH₂OCHF₂, in conjunction with any of the above or belowembodiments.

In another embodiment B-3, the invention includes compounds wherein R¹is H, F, CH₃, C₂H₅, CF₂H, CH₂F, CH₂OCH₂F, CH₂OCF₂H or CH₂OCF₃, inconjunction with any of the above or below embodiments.

In another embodiment B-4, the invention includes compounds wherein R¹is H, F, Cl, CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of theabove or below embodiments.

In another embodiment B-5, the invention includes compounds wherein R¹is H, F, CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments.

In another embodiment B-6, the invention includes compounds wherein R¹is H, F or CF₃, in conjunction with any of the above or belowembodiments.

In another embodiment B-7, the invention includes compounds wherein R¹is H or F, in conjunction with any of the above or below embodiments.

In another embodiment B-8, the invention includes compounds wherein R¹is H, in conjunction with any of the above or below embodiments.

In another embodiment B-9, the invention includes compounds wherein R¹is F, in conjunction with any of the above or below embodiments.

In another embodiment B-10, the invention includes compounds wherein R¹is CF₃, in conjunction with any of the above or below embodiments.

In another embodiment C, the invention includes compounds wherein R² isH, F, Cl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₆-alkyl,—OC₁₋₆-alkyl, —S(O)_(o)C₁₋₆-alkyl, —NHC₁₋₆-alkyl or —C(O)C₁₋₆-alkyl,wherein each of the C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl, and C₁₋₆-alkylportion of —CH₂OC₁₋₆-alkyl, —OC₁₋₆-alkyl, —NHC₁₋₆-alkyl and—C(O)C₁₋₆-alkyl are optionally substituted with 1-4 substituents of F,oxo or OH, in conjunction with any of the above or below embodiments.

In another embodiment C-1, the invention includes compounds wherein R²is H, F, Cl, C₂₋₄alkenyl, C₂₋₄alkynyl, CN, —CH₂OC₁₋₃-alkyl,—OC₁₋₃-alkyl, wherein each of the C₂₋₄alkenyl, C₂₋₄alkynyl andC₁₋₃-alkyl portion of —CH₂OC₁₋₃-alkyl and —OC₁₋₃-alkyl are optionallysubstituted with 1-4 substituents of F, in conjunction with any of theabove or below embodiments.

In another embodiment C-2, the invention includes compounds wherein R²is H, F, Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃,C(O)CH₃ or CH₂OCHF₂, in conjunction with any of the above or belowembodiments.

In another embodiment C-3, the invention includes compounds wherein R²is H, F, CH₃, C₂H₅, CF₂H, CH₂F, CH₂OCH₂F, CH₂OCF₂H or CH₂OCF₃, inconjunction with any of the above or below embodiments.

In another embodiment C-4, the invention includes compounds wherein R²is H, F, Cl, CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of theabove or below embodiments.

In another embodiment C-5, the invention includes compounds wherein R¹is H, F, CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments.

In another embodiment C-6, the invention includes compounds wherein R¹is H, F or CF₃, in conjunction with any of the above or belowembodiments.

In another embodiment C-7, the invention includes compounds wherein R²is H or F, in conjunction with any of the above or below embodiments.

In another embodiment C-8, the invention includes compounds wherein R²is H, in conjunction with any of the above or below embodiments.

In another embodiment C-9, the invention includes compounds wherein R²is F, in conjunction with any of the above or below embodiments.

In another embodiment C-10, the invention includes compounds wherein R²is CF₃, in conjunction with any of the above or below embodiments.

In another embodiment D, the invention includes compounds wherein R³ isC₁₋₄alkyl, CH₂OC₁₋₄alkyl, CH₂OH, C₁₋₄haloalkyl or cyclopropyl, whereineach of the C₁₋₄alkyl, CH₂OC₁₋₄alkyl, C₁₋₄haloalkyl and cyclopropyl isoptionally substituted with 1-4 F atoms, in conjunction with any of theabove or below embodiments.

In another embodiment D-1, the invention includes compounds wherein R³is C₁₋₄alkyl, C₁₋₄haloalkyl, CH₂OH, CH₂OCHF₂ or cyclopropyl, whereineach of the C₁₋₄alkyl, C₁₋₄haloalkyl and cyclopropyl is optionallysubstituted with 1-4 F atoms, in conjunction with any of the above orbelow embodiments.

In another embodiment D-2, the invention includes compounds wherein R³is C₁₋₄alkyl, CH₂OH, CH₂OCH₂F, CH₂OCF₂H, or cyclopropyl, wherein each ofthe C₁₋₄alkyl and cyclopropyl is optionally substituted with 1-2 Fatoms, in conjunction with any of the above or below embodiments.

In another embodiment D-3, the invention includes compounds wherein R³is CH₃, CF₃, C₂H₅, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments.

In another embodiment D-4, the invention includes compounds wherein R³is CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of the above or belowembodiments.

In another embodiment E, the invention includes compounds wherein A⁴ isCR⁴ wherein R⁴ is H, halo, haloalkyl, haloalkoxyl, C₁₋₄-alkyl, CN, OH,OC₁₋₄-alkyl, S(O)_(o)C₁₋₄-alkyl, NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl, inconjunction with any of the above or below embodiments.

In another embodiment E-1, the invention includes compounds wherein A⁴is CR⁴ wherein R⁴ is H, F, Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃,SCH₃, NHCH₃ or C(O)CH₃, in conjunction with any of the above or belowembodiments.

In another embodiment E-2, the invention includes compounds wherein A⁴is CR⁴ wherein R⁴ is H, F, CF₃, CF₂H, CH₂F or CH₃, in conjunction withany of the above or below embodiments.

In another embodiment E-3, the invention includes compounds wherein A⁴is CR⁴ wherein R⁴ is H or F, in conjunction with any of the above orbelow embodiments.

In another embodiment E-4, the invention includes compounds wherein A⁴is N, in conjunction with any of the above or below embodiments.

In another embodiment F, the invention includes compounds wherein A⁵ isCR⁵ wherein R⁵ is H, halo, haloalkyl, haloalkoxyl, C₁₋₄-alkyl, CN, OH,OC₁₋₄-alkyl, S(O)_(o)C₁₋₄-alkyl, NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl, inconjunction with any of the above or below embodiments.

In another embodiment F-1, the invention includes compounds wherein A⁵is CR⁵ wherein R⁵ is H, F, Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃,SCH₃, NHCH₃ or C(O)CH₃, in conjunction with any of the above or belowembodiments.

In another embodiment F-2, the invention includes compounds wherein A⁵is CR⁵ wherein R⁵ is H, F, CF₃, CF₂H, CH₂F or CH₃, in conjunction withany of the above or below embodiments.

In another embodiment F-3, the invention includes compounds wherein A⁵is CR⁵ wherein R⁵ is H or F, in conjunction with any of the above orbelow embodiments.

In another embodiment F-4, the invention includes compounds wherein A⁵is N, in conjunction with any of the above or below embodiments.

In another embodiment G, the invention includes compounds wherein A⁶ isCR⁶ wherein R⁶ is H, halo, haloalkyl, haloalkoxyl, C₁₋₄-alkyl, CN, OH,OC₁₋₄-alkyl, S(O)_(o)C₁₋₄-alkyl, NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl, inconjunction with any of the above or below embodiments.

In another embodiment G-1, the invention includes compounds wherein A⁶is CR⁶ wherein R⁶ is H, F, Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃,SCH₃, NHCH₃ or C(O)CH₃, in conjunction with any of the above or belowembodiments.

In another embodiment G-2, the invention includes compounds wherein A⁶is CR⁶ wherein R⁶ is H, F, CF₃, CF₂H, CH₂F or CH₃, in conjunction withany of the above or below embodiments.

In another embodiment G-3, the invention includes compounds wherein A⁶is CR⁶ wherein R⁶ is H or F, in conjunction with any of the above orbelow embodiments.

In another embodiment G-4, the invention includes compounds wherein A⁶is N, in conjunction with any of the above or below embodiments.

In another embodiment H, the invention includes compounds wherein A⁸ isCR⁸ wherein R⁸ is H, halo, haloalkyl, haloalkoxyl, C₁₋₄-alkyl, CN, OH,OC₁₋₄-alkyl, S(O)_(o)C₁₄-alkyl, NHC₁₋₄-alkyl or C(O)C₁₋₄-alkyl, inconjunction with any of the above or below embodiments.

In another embodiment H-1, the invention includes compounds wherein A⁸is CR⁸ wherein R⁸ is H, F, Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃,SCH₃, NHCH₃ or C(O)CH₃, in conjunction with any of the above or belowembodiments.

In another embodiment H-2, the invention includes compounds wherein A⁸is CR⁸ wherein R⁸ is H, F, CF₃, CF₂H, CH₂F or CH₃, in conjunction withany of the above or below embodiments.

In another embodiment H-3, the invention includes compounds wherein A⁸is CR⁸ wherein R⁸ is H or F, in conjunction with any of the above orbelow embodiments.

In another embodiment H-4, the invention includes compounds wherein A⁸is N, in conjunction with any of the above or below embodiments.

In another embodiment I, the invention includes compounds wherein nomore than two of A⁴, A⁵, A⁶ and A⁸ is N, in conjunction with any of theabove or below embodiments.

In another embodiment I-1, the invention includes compounds wherein nomore than one of A⁴, A⁵, A⁶ and A⁸ is N, in conjunction with any of theabove or below embodiments.

In another embodiment 1-2, the invention includes compounds wherein A⁴is CR⁴,

A⁵ is CR⁵ or N, A⁶ is CR⁶ and A⁸ is CR⁸, in conjunction with any of theabove or below embodiments.

In another embodiment, the invention includes compounds wherein A⁴ isCR⁴ or N, A⁵ is CR⁵, A⁶ is CR⁶ and A⁸ is CR⁸, in conjunction with any ofthe above or below embodiments.

In another embodiment 1-3, the invention includes compounds wherein A⁴is N, A⁵ is CR⁵, A⁶ is CR⁶ and A⁸ is CR⁸, in conjunction with any of theabove or below embodiments.

In another embodiment 1-4, the invention includes compounds wherein A⁴is CR⁴, A⁵ is N, A⁶ is CR⁶, and A⁸ is CR⁸, in conjunction with any ofthe above or below embodiments.

In another embodiment 1-5, the invention includes compounds wherein A⁴is CR⁴, A⁵ is CR⁵, A⁶ is N, and A⁸ is CR⁸, in conjunction with any ofthe above or below embodiments.

In another embodiment 1-6, the invention includes compounds wherein A⁴is CR⁵, A⁵ is CR⁵, A⁶ is CR⁶, and A⁸ is N, in conjunction with any ofthe above or below embodiments.

In another embodiment 1-7, the invention includes compounds of FormulasI, II or III, wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided that no more than one of A⁴, A⁵, A⁶ and A⁸ isN;

each of R^(a) and R^(b), independently, is H, F, Cl, CF₃, OCF₃, methyl,ethyl, CN, OH, OCH₃, SCH₃, NHCH₃, C(O)CH₃ or CH₂OCHF₂;

each of R¹ and R², independently, is H, F, Cl, CF₃, OCF₃, methyl, ethyl,CN, OH, OCH₃, SCH₃, NHCH₃, C(O)CH₃ or CH₂OCHF₂;

R³ is C₁₋₄alkyl, C₁₋₄haloalkyl, CH₂OH, CH₂OCHF₂ or cyclopropyl; and

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl, CF₂H, CH₂F, CF₃,OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃, inconjunction with any of the above or below embodiments.

In another embodiment 1-8, the invention includes compounds of FormulasI, II or III, wherein

A⁴ is CR⁴;

A⁵ is CR⁵;

A⁶ is CR⁶; and

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,CF₃, CF₂H, CH₂F or CH₃, in conjunction with any of the above or belowembodiments.

In another embodiment 1-9, the invention includes compounds of FormulasI, II or III, wherein A⁴ is CH, CF or N, A⁵ is CH, CF or N, A⁶ is CH, CFor N, A⁸ is CH, CF or N, one of A⁴, A⁵, A⁶ and A⁸ is N, in conjunctionwith any of the above or below embodiments.

In another embodiment J, the invention includes compounds of Formulas I,II or III, wherein R⁷ is —NH—R⁹, —NH—C(═O)—R⁹, —C(═O)NH—R⁹, —O—R⁹,—S—R⁹; or R⁷ is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N, in conjunction        with any of        the above or below embodiments.

In another embodiment J-1, the invention includes compounds of FormulasI, II or III, wherein R⁷ is —NH—R⁹, —NH—C(═O)—R⁹ or

wherein V is NR¹⁰, O or S; and

each W, independently, is CH, CF, CCl, CCH₃ or N, in conjunction withany of the above or below embodiments.

In another embodiment J-2, the invention includes compounds of FormulasI, II or III, wherein R⁷ is —NH—C(═O)—R⁹ or

wherein V is NR¹⁰, O or S; and

each W, independently, is CH, CF, CCl or N, in conjunction with any ofthe above or below embodiments.

In another embodiment J-3, the invention includes compounds of FormulasI, II or III, wherein R⁷ is —NH—C(═O)—R⁹, in conjunction with any of theabove or below embodiments.

In another embodiment J-4, the invention includes compounds of FormulasI, II or III, wherein R⁷ is —NH—R⁹, in conjunction with any of the aboveor below embodiments.

In another embodiment J-5, the invention includes compounds wherein R⁷is

-   -   wherein V is NR¹⁰, O or S; and    -   each W, independently, is CH, CF, CCl, CCH₃ or N, in conjunction        with any of        the above or below embodiments.

In another embodiment J-6, the invention includes compounds wherein R⁷is

wherein V is NR¹⁰, O or S; and

each W, independently, is CH, CF, CCl, CCH₃ or N, in conjunction withany of the above or below embodiments.

In another embodiment J-7, the invention includes compounds wherein R⁷is —NH—R⁹, —O—R⁹ or —S—R⁹, in conjunction with any of the above or belowembodiments.

In another embodiment J-8, the invention includes compounds wherein R⁷is —O—R⁹ or —S—R⁹, in conjunction with any of the above or belowembodiments.

In another embodiment J-9, the invention includes compounds wherein R⁷is —NH—R⁹, —NH—C(═O)—R⁹, —C(═O)NH—R⁹, —O—R⁹ or —S—R⁹, wherein R⁹ isacetyl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or a fully or partiallyunsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9- or10-membered bicyclic ring formed of carbon atoms, said ring optionallyincluding 1-4 heteroatoms if monocyclic or 1-5 heteroatoms if bicyclic,said heteroatoms selected from O, N or S, wherein the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionally substituted,independently, with 1-5 substituents of R¹⁰, in conjunction with any ofthe above or below embodiments.

In another embodiment K, the invention includes compounds wherein R⁹ isacetyl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or a fully or partiallyunsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9- or10-membered bicyclic ring formed of carbon atoms, said ring optionallyincluding 1-4 heteroatoms if monocyclic or 1-5 heteroatoms if bicyclic,said heteroatoms selected from O, N or S, wherein the C₁₋₆-alkyl,C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionally substituted,independently, with 1-5 substituents of R¹⁰, in conjunction with any ofthe above or below embodiments.

In another embodiment K-1, the invention includes compounds wherein eachR⁹, independently, is acetyl, C₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl or aring selected from phenyl, pyridyl, pyrimidyl, pyrazinyl, pyridazinyl,pyrazolyl, isoxazolyl, thiazolyl, naphthyl, quinolinyl, isoquinolinyl,quinazolinyl, naphthyridinyl, phthalazinyl, pyranyl, dihydropyranyl,tetrahydropyranyl, furanyl, dihydrofuranyl, tetrahydrofuranyl, thienyl,pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl, piperidinyl, piperazinyl,morpholinyl, azetidinyl, 8-oxo-3-aza-bicyclo[3.2.1]oct-3-yl,aza-bicyclo[2.2.1]hept-5-yl, 2-oxo-7-aza-[3,5]-spironon-7-yl,cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl, wherein theC₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionallysubstituted, independently, with 1-5 substituents of R¹⁰, in conjunctionwith any of the above or below embodiments.

In another embodiment K-2, the invention includes compounds wherein eachR⁹ is a ring selected from phenyl, pyridyl, pyrimidyl, pyrazinyl,pyridazinyl, pyrazolyl, pyrazolo[3,4-c]pyridinyl, oxazolyl, isoxazolyl,thiazolyl, isothiazolyl or thienyl, wherein the ring is optionallysubstituted with 1-5 substituents of R¹⁰, in conjunction with any of theabove or below embodiments.

In another embodiment K-2, the invention includes compounds of FormulasI, II, and III, and any sub-formula thereof as described herein, whereinR⁹ is a ring selected from the group consisting of phenyl, pyridyl,pyrimidyl, pyrazinyl, pyridazinyl, pyrazolyl, isoxazolyl, thiazolyl,thienyl, furanyl and pyrrolyl, wherein the ring is optionallysubstituted, independently, with 1-3 substituents of R¹⁰, wherein eachR¹⁰, independently, is F, Cl, CN, NO₂, NH₂, OH, CF₃, CHF₂, CH₂F, CH₃,—OCH₃, C₂H₅, —OC₂H₅, —CH₂CF₃, —CH₂CHF₂, propyl, propoxy, isopropyl,isopropoxy, cyclopropyl, butyl, butoxyl, cyclobutyl, isobutoxy,tert-butoxy, isobutyl, sec-butyl, tert-butyl, cyclopropylmethoxy,2-butynyloxy or oxetan-3yl, in conjunction with any of the above orbelow embodiments.

In another embodiment L, the present invention provides compounds, andsolvates, tautomers, hydrates, stereoisomers and pharmaceuticallyacceptable salts thereof, as defined by Formulas I, I-A, I—B, I—C or II,wherein

A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, provided no more than one of A⁴, A⁵, A⁶ and A⁸ is N;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

R³ is C₁₋₄alkyl, C₁₋₄haloalkyl, CH₂OH, CH₂OCHF₂ or cyclopropyl; and

each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F, Cl, CF₂H, CH₂F, CF₃,OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃, inconjunction with any of the above or below embodiments.

In another embodiment M, the present invention provides compounds, andsolvates, tautomers, hydrates, stereoisomers and pharmaceuticallyacceptable salts thereof, as defined by Formulas I and II, wherein

R⁷ is —NH—R⁹, —NH—C(═O)—R⁹ or

-   -   wherein V is NR¹⁰, O or S; and

each W, independently, is CH, CF, CCl, CCH₃ or N, in conjunction withany of the above or below embodiments.

In another embodiment N-1, the invention includes compounds of FormulaI-A wherein A⁴ is CR⁴;

A⁵ is CR⁵ or N;

A⁶ is CR⁶;

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

R³ is CH₃, C₂H₅, CF₂H or CH₂F;

R⁹ is acetyl, C₁₋₆-alkyl, C₂ alkenyl, C₂₋₄alkynyl or a fully orpartially unsaturated 3-, 4-, 5-, 6- or 7-membered monocyclic or 8-, 9-or 10-membered bicyclic ring formed of carbon atoms, said ringoptionally including 1-4 heteroatoms if monocyclic or 1-5 heteroatoms ifbicyclic, said heteroatoms selected from O, N or S, wherein theC₁₋₆-alkyl, C₂₋₄alkenyl, C₂₋₄alkynyl and ring are optionallysubstituted, independently, with 1-5 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In another embodiment N-2, the invention includes compounds of FormulaI-A wherein A⁴ is CR⁴;

A⁵ is CR⁵;

A⁶ is CR⁶;

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,CF₃, OCF₃, methyl, ethyl, CN or OCH₃;

each of R^(a) and R^(b), independently, is H or F;

each of R¹ and R², independently, is H, F or CF₃;

R³ is CF₃, CH₃, CF₂H or CH₂F;

R⁹ is a ring selected from phenyl, pyridyl, pyrimidyl, pyrazinyl,pyridazinyl, pyrazolyl, isoxazolyl, thiazolyl, furanyl, thienyl andpyrrolyl, wherein the ring is optionally substituted, independently,with 1-3 substituents of R¹⁰; and

each R¹⁰, independently, is H, halo, haloalkyl, CN, OH, NO₂, NH₂, SF₅,acetyl, —C(O)NHCH₃, oxo, cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl,C₂₋₆alkenyl, C₂₋₆ alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-,C₁₋₆dialkylamino-, C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl,isoxazolyl, dihydropyranyl, pyrrolyl, pyrrolidinyl, tetrahydropyrrolyl,piperazinyl, oxetan-3-yl, imidazo-pyridinyl or dioxolyl, wherein each ofthe cyclopropylmethoxy, 2-butynyloxy, C₁₋₆alkyl, C₂₋₆alkenyl,C₂₋₆alkynyl, C₃₋₆cycloalkyl, C₁₋₆alkylamino-, C₁₋₆dialkylamino-,C₁₋₆alkoxyl, C₁₋₆thioalkoxyl, morpholinyl, pyrazolyl, isoxazolyl,dihydropyranyl, pyrrolidinyl, oxetan-3-yl or dioxolyl, is optionallysubstituted independently with 1-5 substituents of F, Cl, CN, NO₂, NH₂,OH, oxo, CF₃, CHF₂, CH₂F, methyl, methoxy, ethyl, ethoxy, CH₂CF₃,CH₂CHF₂, propyl, propoxy, isopropyl, isopropoxy, cyclopropyl, butyl,butoxyl, cyclobutyl, isobutoxy, tert-butoxy, isobutyl, sec-butyl,tert-butyl, cyclopentyl, cyclohexyl, C₁₋₃alkylamino-, C₁₋₃dialkylamino,C₁₋₃thioalkoxyl tetrahydropyranyl, tetrahydropyrrolyl or oxetan-3yl.

In another embodiment 0-1, the invention includes compounds of FormulaI-B

wherein A⁴ is CR⁴;

A⁵ is CR⁵;

A⁶ is CR⁶;

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃; and

R³ is CH₃, C₂H₅, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments with respect to Formula I-B.

In another embodiment 0-2, the invention includes compounds of FormulaI-B wherein A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is Hor F and provided no more than one of A⁴, A⁵, A⁶ and A⁸ is N;

each of R¹ and R², independently, is H, F or CF₃;

each of R^(a) and R^(b), independently, is H or F; and

R³ is CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments with respect to Formula I-B.

In another embodiment P-1, the invention includes compounds of FormulaI-C wherein A⁴ is CR⁴;

A⁵ is CR⁵;

A⁶ is CR⁶;

A⁸ is CR⁸; wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is H, F,Cl, CF₃, OCF₃, methyl, ethyl, CN, OH, OCH₃, SCH₃, NHCH₃ or C(O)CH₃;

each of R^(a) and R^(b), independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃;

each of R¹ and R², independently, is H, F, CH₃, CH₂F, CHF₂ or CF₃; and

R³ is CH₃, C₂H₅, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments with respect to Formula I-C.

In another embodiment P-2, the invention includes compounds of FormulaI-C wherein A⁴ is CR⁴ or N;

A⁵ is CR⁵ or N;

A⁶ is CR⁶ or N;

A⁸ is CR⁸ or N, wherein each of R⁴, R⁵, R⁶ and R⁸, independently, is Hor F and provided no more than one of A⁴, A⁵, A⁶ and A⁸ is N;

each of R¹ and R², independently, is H, F or CF₃;

each of R^(a) and R^(b), independently, is H or F; and

R³ is CF₃, CH₃, CF₂H or CH₂F, in conjunction with any of the above orbelow embodiments with respect to Formula I-C.

In another embodiment, the invention provides one or more of thecompounds, or a pharmaceutically acceptable salt thereof, of Formulas I,II and III, and sub-formulas thereof, as taught and described herein.

In another embodiment, the invention provides the compound of Formula I,II or III, or a stereoisomer or pharmaceutically acceptable saltthereof, selected from

-   N-(3-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide;-   Racemic mixture of    N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide    and-   N-(3-((1S,5S,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide;-   N-(3-((1S,5S,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-methoxy-1,7-naphthyridin-8-amine;    and-   N-(3-((1S,5S,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-methoxy-1,7-naphthyridin-8-amine

Additional generic and specific compounds representative of theinvention include:

In embodiment 82, the invention provides a compound, or apharmaceutically acceptable salt or tautomer thereof, selected from:

-   N-(3-([(1R,S),(5S,R),(6R,S)]-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-(methoxymethyl)picolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyano-3-methoxypicolinamide;-   N-(3-([1(R,S),5(S,R),6(R,S)]-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropicolinamide;-   N-(3-([1(R,S),5(S,R),6(R,S)]-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyanopicolinamide    compound;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3,5-dichloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-bromopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyanopicolinamide;-   N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-2,4-difluorophenyl)-5-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-chloro-4-fluorophenyl)-5-cyano-3-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2-carboxamide    trifluoroacetate;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide    trifluoroacetate;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-(oxazol-4-ylmethoxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)-4-chloro-1-(difluoromethyl)-1H-pyrazole-3-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-3-methyl-5-(trifluoromethyl)picolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-fluoropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-3,5-dichloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chloro-5-fluorophenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-4-chloro-1-(difluoromethyl)-1H-pyrazole-3-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(oxazol-2-ylmethoxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(oxazol-4-ylmethoxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(difluoromethyl)-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3,5-dichloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(prop-2-yn-1-yloxy)picolinamide;-   N-(3-([1(R,S),5(S,R),6(R,S)]-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1(R,S),5(S,R),6(R,S))-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(difluoromethoxy)-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(difluoromethoxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-bromopyrimidine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-3,5-dichloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide;-   N-(5-((1(R,S),5(S,R),6(R,S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-6-fluoropyridin-3-yl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyano-3-(methoxymethyl)picolinamide;    and-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyano-3-fluoropicolinamide;    and-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-5-cyano-3-methoxypicolinamide.

In embodiment 83, the invention provides a compound, or apharmaceutically acceptable salt or tautomer thereof, selected from:

-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3,5-dichloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-bromopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyanopicolinamide;-   N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-2,4-difluorophenyl)-5-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2-carboxamide    trifluoroacetate;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-(oxazol-4-ylmethoxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3,5-dichloropicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-cyanopicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5-methoxypicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(difluoromethoxy)-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyano-3-methylpicolinamide;-   N-(3-((1R,5S,6R)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide;-   N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyano-3-(methoxymethyl)picolinamide;    and-   N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-5-cyano-3-methoxypicolinamide.

In embodiment 84, the invention provides a compound, or apharmaceutically acceptable salt or tautomer thereof, selected from:

In embodiment 85, the invention provides each individual compoundaccording to embodiments 82-84, or a pharmaceutically acceptable salt ortautomer thereof.

For instance, in embodiment 86, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 87, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 88, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 89, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 90, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 91, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 92, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 93, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 94, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 95, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 96, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 97, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 98, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 99, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof.

In embodiment 100, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 101, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 102, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 103, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 104, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 105 the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 106, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In embodiment 107, the invention provides the compound

or a pharmaceutically acceptable salt or tautomer thereof

In the structures depicted hereinabove, an “—N” in the 1,3-oxazine headgroup is intended to be an —NH₂ (an amine groups); and lines endingwithout an atom are understood by persons of ordinary skill in the artto be a —CH₃ group.

In another embodiment, the invention provides the compound of FormulaI-A, I—B and I-C, II, II-A, or a stereoisomer or pharmaceuticallyacceptable salt thereof, as exemplified herein, provided the compound isnot

-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-methoxy-1,7-naphthyridin-8-amine    or-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide.

All of the possible embodiments described herein for various of the Rgroups of the compounds of Formula I may be applied, as appropriate, tocompounds of Formulas II and III, and any sub-formulas thereof

In another embodiment, the invention provides each of the Exemplarycompounds, and stereoisomers, tautomers, solvates, pharmaceuticallyacceptable salts, derivatives or prodrugs thereof, and relatedintermediates, described herein.

In another embodiment, the invention provides the exemplified compoundsdescribed herein, and pharmaceutically acceptable salt forms of eachthereof.

The invention does not include the following compounds:

-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-methoxy-1,7-naphthyridin-8-amine;    and-   N-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxy-2-pyrazinecarboxamide.

DEFINITIONS

The following definitions should assist in understanding the metes andbounds of the invention.

The term “comprising” is meant to be open ended, i.e., all encompassingand non-limiting. It may be used herein synonymously with “having.”Comprising is intended to include each and every indicated or recitedcomponent or element(s) while not excluding any other components orelements.

The term “C_(α-β)alkyl”, when used either alone or within other termssuch as “haloalkyl” and “alkylamino”, embraces linear or branchedradicals having α to β number of carbon atoms (such as C₁-C₁₀; C₁-C₆; orC₁-C₄). Unless otherwise specified, one or more carbon atoms of the“alkyl” radical may be substituted, such as with a cycloalkyl moiety.Examples of “alkyl” radicals include methyl, cyclopropylmethyl,cyclobutylmethyl, cyclopentylmethyl, ethyl, cyclopropylethyl,cyclobutylethyl, cyclopentylethyl, n-propyl, isopropyl, n-butyl,cyclopropylbutyl, isobutyl, sec-butyl, tert-butyl, pentyl, isoamyl,hexyl and the like.

The term “C_(α-β)alkenyl”, when used alone or in combination, embraceslinear or branched radicals having at least one carbon-carbon doublebond in a moiety having a number of carbon atoms in the range from α andβ. Included within alkenyl radicals are “lower alkenyl” radicals havingtwo to about six carbon atoms and, for example, those radicals havingtwo to about four carbon atoms. Examples of alkenyl radicals include,without limitation, ethenyl, propenyl, allyl, propenyl, butenyl and4-methylbutenyl. The terms “alkenyl” and “lower alkenyl”, embraceradicals having “cis” and “trans” orientations, or alternatively, “E”and “Z” orientations, as appreciated by those of ordinary skill in theart.

The term “C_(α-β)alkynyl”, when used alone or in combination, denoteslinear or branched radicals having at least one carbon-carbon triplebond in a moiety having a number of carbon atoms in the range from α andβ. Examples of alkynyl radicals include “lower alkynyl” radicals havingtwo to about six carbon atoms and, for example, lower alkynyl radicalshaving two to about four carbon atoms. Examples of such radicalsinclude, without limitation, ethynyl, propynyl (propargyl), butynyl, andthe like.

The term “C_(α-β)-alkyl”, “C_(α-β)-alkenyl” and “C_(α-β)-alkynyl”, whenused with other terms such as “wherein 1, 2 or 3 carbon atoms of saidC_(α-β)-alkyl, C_(α-β)-alkenyl or C_(2α-β)-alkynyl is optionallyreplaced with a heteroatom selected from O, S, S(O), S(O)₂ and N”embraces linear or branched radicals wherein one or more of the carbonatoms may be replaced with a heteroatom. Examples of such “alkyl”radicals include —O-methyl, —O— ethyl, —CH₂—O—CH₃, —CH₂CH₂—O—CH₃,—NH—CH₂, —CH₂CH₂—N(CH₃)—CH₃, —S—(CH₂)₃CH₂, —CH₂CH₂—S—CH₃ and the like.Accordingly, such radicals also include radicals encompassed by —OR⁷where R⁷ may be defined as a C_(α-β)-alkyl. Examples of such “alkenyl”radicals include —NH—CH₂CH═CH₂, —S—CH₂CH₂CH═CHCH₃ and the like. Similarexamples exist for such “alkynyl” radicals, as appreciated by thoseskilled in the art.

The term “C_(α-β)alkoxyl” or “—OC_(α-β)alkyl” when used alone or incombination, embraces linear or branched oxygen-containing alkylradicals each having α to β number of carbon atoms (such as C₁-C₁₀). Theterms “alkoxy” and “alkoxyl”, when used alone or in combination,embraces linear or branched oxygen-containing radicals each having alkyland substituted alkyl portions of one or more carbon atoms. Examples ofsuch radicals include methoxy, ethoxy, propoxy, butoxy, tert-butoxy andneopentoxy. Alkoxy radicals may be further substituted with one or morehalo atoms, such as fluoro, chloro or bromo, to provide “haloalkoxy”radicals or with other substitution. Examples of such radicals includefluoromethoxy, chloromethoxy, trifluoromethoxy, trifluoroethoxy,fluoroethoxy and fluoropropoxy.

The term “aryl”, when used alone or in combination, means a carbocyclicaromatic moiety containing one, two or even three rings wherein suchrings may be attached together in a fused manner. Every ring of an“aryl” multi-ring system need not be aromatic, and the ring(s) fused tothe aromatic ring may be partially or fully unsaturated and include oneor more heteroatoms selected from nitrogen, oxygen and sulfur. Thus, theterm “aryl” embraces aromatic radicals such as phenyl, naphthyl,indenyl, tetrahydronaphthyl, dihydrobenzafuranyl, anthracenyl, indanyl,benzodioxazinyl, and the like. The “aryl” group may be substituted, suchas with 1 to 5 substituents including lower alkyl, hydroxyl, halo,haloalkyl, nitro, cyano, alkoxy and lower alkylamino, and the like.Phenyl substituted with —O—CH₂—O— or —O—CH₂—CH₂—O— forms an arylbenzodioxolyl substituent.

The term “C_(α-β)-cycloalkyl”, also referred to herein as “carbocyclic”,when used alone or in combination, denotes a partially or fullysaturated ring radical having a number of carbon atoms in the range fromα and β. The “cycloalkyl” may contain one (“monocyclic”), two(“bicyclic”) or even three (“tricyclic”) rings wherein such rings may beattached together in a fused manner and each formed from carbon atoms.Examples of saturated carbocyclic radicals include saturated 3 to6-membered monocyclic groups such as cyclopropane, cyclobutane,cyclopentane and cyclohexane. Cycloalkyls may be substituted asdescribed herein.

The terms “ring” and “ring system” refer to a ring comprising thedelineated number of atoms, the atoms being carbon or, where indicated,a heteroatom such as nitrogen, oxygen or sulfur. Where the number ofatoms is not delineated, such as a “monocyclic ring system” or a“bicyclic ring system”, the numbers of atoms are 3-8 for a monocyclicand 6-12 for a bicyclic ring. The ring itself, as well as anysubstitutents thereon, may be attached at any atom that allows a stablecompound to be formed. The term “nonaromatic” ring or ring system refersto the fact that at least one, but not necessarily all, rings in abicyclic or tricyclic ring system is nonaromatic.

The terms “partially or fully saturated or unsaturated” and “saturatedor partially or fully unsaturated” with respect to each individual ring,refer to the ring either as fully aromatic (fully unsaturated),partially aromatic (or partially saturated) or fully saturated(containing no double or triple bonds therein). If not specified assuch, then it is contemplated that each ring (monocyclic) in a ringsystem (if bicyclic or tricyclic) may either be fully aromatic,partially aromatic or fully saturated, and optionally substituted withup to 5 substituents. This includes carbocyclics, heterocyclics, aryland heteroaryl rings.

The term “halo”, when used alone or in combination, means halogens suchas fluorine, chlorine, bromine or iodine atoms.

The term “haloalkyl”, when used alone or in combination, embracesradicals wherein any one or more of the alkyl carbon atoms issubstituted with halo as defined above. For example, this term includesmonohaloalkyl, dihaloalkyl and polyhaloalkyl radicals such as aperhaloalkyl. A monohaloalkyl radical, for example, may have either aniodo, bromo, chloro or fluoro atom within the radical. Dihalo andpolyhaloalkyl radicals may have two or more of the same halo atoms or acombination of different halo radicals. Examples of haloalkyl radicalsinclude fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl,dichloromethyl, trichloromethyl, pentafluoroethyl, heptafluoropropyl,difluorochloromethyl, dichlorofluoromethyl, difluoroethyl,difluoropropyl, dichloroethyl and dichloropropyl. “Perfluoroalkyl”, asused herein, refers to alkyl radicals having all hydrogen atoms replacedwith fluoro atoms. Examples include trifluoromethyl andpentafluoroethyl.

The term “heteroaryl”, as used herein, either alone or in combination,means a fully unsaturated (aromatic) ring moiety formed from carbonatoms and having one or more heteroatoms selected from nitrogen, oxygenand sulfur. The ring moiety or ring system may contain one(“monocyclic”), two (“bicyclic”) or even three (“tricyclic”) ringswherein such rings are attached together in a fused manner. Every ringof a “heteroaryl” ring system need not be aromatic, and the ring(s)fused thereto (to the heteroaromatic ring) may be partially or fullysaturated and optionally include one or more heteroatoms selected fromnitrogen, oxygen and sulfur. The term “heteroaryl” does not includerings having ring members of —O—O—, —O—S— or —S—S—.

Examples of unsaturated heteroaryl radicals, include unsaturated 5- to6-membered heteromonocyclyl groups containing 1 to 4 nitrogen atoms,including for example, pyrrolyl, imidazolyl, pyrazolyl, 2-pyridyl,3-pyridyl, 4-pyridyl, pyrimidyl, pyrazinyl, pyridazinyl, triazolyl[e.g., 4H-1,2,4-triazolyl, 1H-1,2,3-triazolyl, 2H-1,2,3-triazolyl] andtetrazole; unsaturated 7- to 10-membered heterobicyclyl groupscontaining 1 to 4 nitrogen atoms, including for example, quinolinyl,isoquinolinyl, quinazolinyl, isoquinazolinyl, aza-quinazolinyl, and thelike; unsaturated 5- to 6-membered heteromonocyclic group containing anoxygen atom, for example, pyranyl, 2-furyl, 3-furyl, benzofuryl, etc.;unsaturated 5 to 6-membered heteromonocyclic group containing a sulfuratom, for example, 2-thienyl, 3-thienyl, benzothienyl, etc.; unsaturated5- to 6-membered heteromonocyclic group containing 1 to 2 oxygen atomsand 1 to 3 nitrogen atoms, for example, oxazolyl, isoxazolyl,oxadiazolyl [e.g., 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl,1,2,5-oxadiazolyl]; unsaturated 5 to 6-membered heteromonocyclic groupcontaining 1 to 2 sulfur atoms and 1 to 3 nitrogen atoms, for example,thiazolyl, isothiazolyl, thiadiazolyl [e.g., 1,2,4-thiadiazolyl,1,3,4-thiadiazolyl, 1,2,5-thiadiazolyl].

The terms “heterocycle” or “heterocyclic”, when used alone or incombination, means a partially or fully saturated ring moiety containingone, two or even three rings wherein such rings may be attached togetherin a fused manner, formed from carbon atoms and including one or moreheteroatoms selected from N, O or S. Examples of saturated heterocyclicradicals include saturated 3 to 6-membered heteromonocyclic groupscontaining 1 to 4 nitrogen atoms [e.g. pyrrolidinyl, imidazolidinyl,piperidinyl, pyrrolinyl, piperazinyl]; saturated 3 to 6-memberedheteromonocyclic group containing 1 to 2 oxygen atoms and 1 to 3nitrogen atoms [e.g. morpholinyl]; saturated 3 to 6-memberedheteromonocyclic group containing 1 to 2 sulfur atoms and 1 to 3nitrogen atoms [e.g., thiazolidinyl]. Examples of partially saturatedheterocyclyl radicals include dihydrothienyl, dihydropyranyl,dihydrofuryl and dihydrothiazolyl.

The term “heterocycle” also embraces radicals where heterocyclicradicals are fused/condensed with aryl radicals: unsaturated condensedheterocyclic group containing 1 to 5 nitrogen atoms, for example,indolyl, isoindolyl, indolizinyl, benzimidazolyl, quinolyl, isoquinolyl,indazolyl, benzotriazolyl, tetrazolopyridazinyl [e.g., tetrazolo[1,5-b]pyridazinyl]; unsaturated condensed heterocyclic group containing1 to 2 oxygen atoms and 1 to 3 nitrogen atoms [e.g. benzoxazolyl,benzoxadiazolyl]; unsaturated condensed heterocyclic group containing 1to 2 sulfur atoms and 1 to 3 nitrogen atoms [e.g., benzothiazolyl,benzothiadiazolyl]; and saturated, partially unsaturated and unsaturatedcondensed heterocyclic group containing 1 to 2 oxygen or sulfur atoms[e.g. benzofuryl, benzothienyl, 2,3-dihydro-benzo[1,4]dioxinyl anddihydrobenzofuryl]. Examples of heterocyclic radicals include five toten membered fused or unfused radicals.

Examples of partially saturated and fully saturated heterocyclylsinclude, without limitation, pyrrolidinyl, imidazolidinyl, piperidinyl,pyrrolinyl, pyrazolidinyl, piperazinyl, morpholinyl, tetrahydropyranyl,thiazolidinyl, dihydrothienyl, 2,3-dihydro-benzo[1,4]dioxanyl,indolinyl, isoindolinyl, dihydrobenzothienyl, dihydrobenzofuryl,isochromanyl, chromanyl, 1,2-dihydroquinolyl,1,2,3,4-tetrahydro-isoquinolyl, 1,2,3,4-tetrahydro-quinolyl,2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl,5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl,3,4-dihydro-2H-benzo[1,4]oxazinyl, benzo[1,4]dioxanyl,2,3-dihydro-1H-1λ′-benzo[d]isothiazol-6-yl, dihydropyranyl, dihydrofuryland dihydrothiazolyl, and the like.

The term “a 3-8 membered monocyclic or 6-12 membered bicyclic ringsystem, said ring system formed of carbon atoms optionally including 1-3heteroatoms if monocyclic or 1-6 heteroatoms if bicyclic, saidheteroatoms selected from O, N, or S, wherein said ring system isoptionally substituted” refers to a single ring of 3-, 4-, 5-, 6-, 7- or8-atom membered or a 6-, 7-, 8-, 9-, 10-, 11 or 12-atom memberedbicyclic ring system comprising the delineated number of atoms, theatoms being carbon or, where indicated, a heteroatom such as nitrogen(N), oxygen (O) or sulfur (S). Where the number of atoms is notdelineated, such as a “monocyclic ring system” or a “bicyclic ringsystem”, the numbers of atoms are 3-8 for a monocyclic and 6-12 for abicyclic ring. The ring or ring system may contain substitutentsthereon, attached at any atom that allows a stable compound to beformed. A bicyclic ring is intended to include fused ring systems aswell as spiro-fused rings. This phrase encompasses carbocyclics,heterocyclics, aryl and heteroaryl rings.

The term “alkylamino” includes “N-alkylamino” where amino radicals areindependently substituted with one alkyl radical. Preferred alkylaminoradicals are “lower alkylamino” radicals having one to six carbon atoms.Even more preferred are lower alkylamino radicals having one to threecarbon atoms. Examples of such lower alkylamino radicals includeN-methylamino, and N-ethylamino, N-propylamino, N-isopropylamino and thelike.

The term “dialkylamino” includes “N, N-dialkylamino” where aminoradicals are independently substituted with two alkyl radicals.Preferred alkylamino radicals are “lower alkylamino” radicals having oneto six carbon atoms. Even more preferred are lower alkylamino radicalshaving one to three carbon atoms. Examples of such lower alkylaminoradicals include N,N-dimethylamino, N,N-diethylamino, and the like.

The term “carbonyl”, whether used alone or with other terms, such as“aminocarbonyl”, denotes —(C═O)—. “Carbonyl” is also used hereinsynonymously with the term “oxo”.

The term “alkylthio” or “thioalkoxy” embraces radicals containing alinear or branched alkyl radical, of one to ten carbon atoms, attachedto a divalent sulfur atom. An example of “alkylthio” or “thioalkoxy” ismethylthio, (CH₃S—).

The term “Formula I” includes any sub formulas, such as Formulas II andIII. Similar with Formulas II and III, in that they include sub-formulaswhere described.

The present invention also includes tautomeric forms of compounds of theinvention. For example, the invention comprises compounds of formula Ias well as their tautomers, as shown:

Similarly, tauatomers of compounds of Formulas II and III, and ofcompounds of sub-formulas of compounds of Formulas I, II and III, arealso included in the invention.

The term “pharmaceutically-acceptable” when used with reference to acompound of Formulas I-III is intended to refer to a form of thecompound that is safe for administration. For example, a salt form, asolvate, a hydrate, a prodrug or derivative form of a compound ofFormulas I-III, which has been approved for mammalian use, via oralingestion or other routes of administration, by a governing body orregulatory agency, such as the Food and Drug Administration (FDA) of theUnited States, is pharmaceutically acceptable.

Included in the compounds of Formulas I-III are the pharmaceuticallyacceptable salt forms of the free-base compounds. The term“pharmaceutically-acceptable salts” embraces salts commonly used to formalkali metal salts and to form addition salts of free acids or freebases. As appreciated by those of ordinary skill in the art, salts maybe formed from ionic associations, charge-charge interactions, covalentbonding, complexation, coordination, etc. The nature of the salt is notcritical, provided that it is pharmaceutically acceptable.

Suitable pharmaceutically acceptable acid addition salts of compounds ofFormulas I-III may be prepared from an inorganic acid or from an organicacid. Examples of such inorganic acids are hydrochloric, hydrobromic,hydroiodic, hydrofluoric, nitric, carbonic, sulfuric and phosphoricacid. Appropriate organic acids may be selected from aliphatic,cycloaliphatic, aromatic, arylaliphatic, heterocyclic, carboxylic andsulfonic classes of organic acids, examples of which include, withoutlimitation, formic, acetic, adipic, butyric, propionic, succinic,glycolic, gluconic, lactic, malic, tartaric, citric, ascorbic,glucuronic, maleic, fumaric, pyruvic, aspartic, glutamic, benzoic,anthranilic, mesylic, 4-hydroxybenzoic, phenylacetic, mandelic, embonic(pamoic), methanesulfonic, ethanesulfonic, ethanedisulfonic,benzenesulfonic, pantothenic, 2-hydroxyethanesulfonic, toluenesulfonic,sulfanilic, cyclohexylaminosulfonic, camphoric, camphorsulfonic,digluconic, cyclopentanepropionic, dodecylsulfonic, glucoheptanoic,glycerophosphonic, heptanoic, hexanoic, 2-hydroxy-ethanesulfonic,nicotinic, 2-naphthalenesulfonic, oxalic, palmoic, pectinic,persulfuric, 2-phenylpropionic, picric, pivalic propionic, succinic,thiocyanic, undecanoic, stearic, algenic, β-hydroxybutyric, salicylic,galactaric and galacturonic acid. Suitable pharmaceutically-acceptablebase addition salts of compounds of Formulas I—III include metallicsalts, such as salts made from aluminum, calcium, lithium, magnesium,potassium, sodium and zinc, or salts made from organic bases including,without limitation, primary, secondary and tertiary amines, substitutedamines including cyclic amines, such as caffeine, arginine,diethylamine, N-ethyl piperidine, histidine, glucamine, isopropylamine,lysine, morpholine, N-ethyl morpholine, piperazine, piperidine,triethylamine, disopropylethylamine and trimethylamine. All of thesesalts may be prepared by conventional means from the correspondingcompound of the invention by reacting, for example, the appropriate acidor base with the compound of Formulas I-III.

Also, the basic nitrogen-containing groups can be quaternized with suchagents as lower alkyl halides, such as methyl, ethyl, propyl, and butylchloride, bromides and iodides; dialkyl sulfates like dimethyl, diethyl,dibutyl, and diamyl sulfates, long chain halides such as decyl, lauryl,myristyl and stearyl chlorides, bromides and iodides, aralkyl halideslike benzyl and phenethyl bromides, and others. Water or oil-soluble ordispersible products are thereby obtained.

Additional examples of such salts can be found in Berge et al., J.Pharm. Sci., 66:1 (1977). Conventional methods may be used to form thesalts. For example, a phosphate salt of a compound of the invention maybe made by combining the desired compound free base in a desiredsolvent, or combination of solvents, with phosphoric acid in a desiredstoichiometric amount, at a desired temperature, typically under heat(depending upon the boiling point of the solvent). The salt can beprecipitated upon cooling (slow or fast) and may crystallize (i.e., ifcrystalline in nature), as appreciated by those of ordinary skill in theart. Further, hemi-, mono-, di, tri- and poly-salt forms of thecompounds of the present invention are also contemplated herein.Similarly, hemi-, mono-, di, tri- and poly-hydrated forms of thecompounds, salts and derivatives thereof, are also contemplated herein.

The term “pharmaceutically-acceptable derivative” as used herein,denotes a derivative which is pharmaceutically acceptable.

The compound(s) of Formulas I-III may be used to treat a subject byadministering the compound(s) as a pharmaceutical composition. To thisend, the compound(s) can be combined with one or more excipients,including without limitation, carriers, diluents or adjuvants to form asuitable composition, which is described in more detail herein.

The term “excipient”, as used herein, denotes any pharmaceuticallyacceptable additive, carrier, adjuvant, or other suitable ingredient,other than the active pharmaceutical ingredient (API), which istypically included for formulation and/or administration purposes.“Diluent” and “adjuvant” are defined hereinafter.

The terms “treat”, “treating,” “treatment,” and “therapy” as used hereinrefer to therapy, including without limitation, curative therapy,prophylactic therapy, and preventative therapy. Prophylactic treatmentgenerally constitutes either preventing the onset of disordersaltogether or delaying the onset of a pre-clinically evident stage ofdisorders in individuals.

The phrase “effective dosage amount” is intended to quantify the amountof each agent, which will achieve the goal of improvement in disorderseverity and the frequency of incidence over treatment of each agent byitself, while avoiding adverse side effects typically associated withalternative therapies. Accordingly, this term is not limited to a singledose, but may comprise multiple dosages required to bring about atherapeutic or prophylactic response in the subject. For example,“effective dosage amount” is not limited to a single capsule or tablet,but may include more than one capsule or tablet, which is the doseprescribed by a qualified physician or medical care giver to thesubject.

The term “leaving group” (also denoted as “LG”) generally refers togroups that are displaceable by a nucleophile. Such leaving groups areknown in the art. Examples of leaving groups include, but are notlimited to, halides (e.g., I, Br, F, Cl), sulfonates (e.g., mesylate,tosylate), sulfides (e.g., SCH₃), N-hydroxsuccinimide,N-hydroxybenzotriazole, and the like. Nucleophiles are species that arecapable of attacking a molecule at the point of attachment of theleaving group causing displacement of the leaving group. Nucleophilesare known in the art. Examples of nucleophilic groups include, but arenot limited to, amines, thiols, alcohols, Grignard reagents, anionicspecies (e.g., alkoxides, amides, carbanions) and the like.

General Synthetic Procedures

The present invention further comprises procedures for the preparationof compounds of Formulas I-III. The compounds of Formulas I-III can besynthesized according to the procedures described in the followingSchemes 1, 2, 3a, 3b, 4 and 5, wherein the substituents are as definedfor Formulas I-III above, except where further noted. The syntheticmethods described below are merely exemplary, and the compounds of theinvention may also be synthesized by alternate routes utilizingalternative synthetic strategies, as appreciated by persons of ordinaryskill in the art.

The following list of abbreviations used throughout the specificationrepresent the following and should assist in understanding theinvention:

-   ACN, MeCN—acetonitrile-   Aq., aq.—aqueous-   Ar—argon (gas)-   BOC—tert-butoxycarbonyl-   BOP—benzotriazol-1-yl-oxy Hexafluorophosphate-   BuLi—Butyllithium-   Cs₂CO₃—cesium carbonate-   CHCl₃—chloroform-   CH₂Cl₂, DCM—dichloromethane, methylene chloride-   Cu(1)I—copper(1) iodide-   DCC—dicyclohexylcarbodiimide-   DEA—diethylamine-   DIC—1,3-diisopropylcarbodiimide-   DIEA, DIPEA—diisopropylethylamine-   DME—dimethoxyethane-   DMF—dimethylformamide-   DMAP—4-dimethylaminopyridine-   DMSO dimethylsulfoxide-   EDC, EDCI—1-(3-dimethylaminopropyl)-3-ethylcarbodiimide-   Et₂O—diethyl ether-   EtOAc—ethyl acetate-   g, gm—gram-   h, hr—hour-   H₂—hydrogen (gas)-   H₂O—water-   HATU—O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluroniumhexafluorophosphate-   HBr—hydrobromic acid-   HCl—hydrochloric acid-   HOBt—1-hydroxybenzotriazole hydrate-   HOAc—acetic acid-   HPLC—high pressure liquid chromatography-   IPA, IpOH—isopropyl alcohol-   K₂CO₃—potassium carbonate-   KI—potassium iodide-   LG—leaving group-   LDA—Lithium diisopropylamide-   LiOH—lithium hydroxide-   MgSO₄—magnesium sulfate-   MS—mass spectrum-   MeOH—methanol-   N₂—nitrogen (gas)-   NaCNBH₃—sodium cyanoborohydride-   Na₂CO₃—sodium carbonate-   NaHCO₃—sodium bicarbonate-   NaH—sodium hydride-   NaI—sodium iodide-   NaBH₄—sodium borohydride-   NaOH—sodium hydroxide-   Na₂SO₄—sodium sulfate-   NH₄Cl—ammonium chloride-   NH₄OH—ammonium hydroxide-   P(t-bu)₃—tri(tert-butyl)phosphine-   Ph₃P—triphenylphosphine-   Pd/C—palladium on carbon-   Pd(PPh₃)₄—palladium(0)triphenylphosphine tetrakis-   Pd(dppf)Cl₂—palladium(1,1-bisdiphenylphosphinoferrocene) II chloride-   Pd(PhCN)₂Cl₂—palladium di-cyanophenyl dichloride-   Pd(OAc)₂—palladium acetate-   Pd₂(dba)₃—tris(dibenzylideneacetone) dipalladium-   PyBop—benzotriazol-1-yl-oxy-tripyrrolidino-phosphonium-   hexafluorophosphate-   RT, rt—room temperature-   RBF, rbf—round bottom flask-   TLC, tlc—thin layer chromatography-   TBAF—Tetrabutylammonium flouride-   TBTU—O-benzotriazol-1-yl-N,N,N,N′-tetramethyluronium    tetrafluoroborate-   TEA, Et₃N—triethylamine-   TFA—trifluoroacetic acid-   THF—tetrahydrofuran-   UV—ultraviolet light

Scheme 1 describes an exemplary method for preparing compounds 7a and 7bof Formulas I, II and III, wherein each of A⁴, A⁵, A⁶ and A⁸ is,independently, as defined hereunder, each of R¹ and R², independently,is H, and R³ is CH₃. Beginning with compound 1, aldehyde oxime may beconverted to the corresponding chloride using N-chlorosuccinimide undersuitable conditions. The chloride of compound 1 may be converted tointermediate 2 by treatment with allyl chloride under suitableconditions and in suitable solvents, to afford racemate 2. Ring closureof intermediate 2 can be effected by treating 2 with a sufficientlystrong base, such as potassium t-butoxide, to provide racemicintermediate 3. The (hetero)aryl group can be installed in compounds ofFormulas I, II and III, using a lewis acid, such as a boron agent, withmethyllithium lithium bromide under suitable conditions to affordintermediates 4a and 4b as a racemic mixture. The oxazole ring ofracemic intermediate 4 can be opened using zinc in acetic acid undersuitable conditions to afford intermediates 5a and 5b as a racemicmixture. Racemic mixture 5a and 5b can be re-closed to the corresponding6-membered ring by treatment of mixture 5a and 5b withbenzoylisothiocyante under suitable conditions and solvent, to provideintermediates 6a and 6b as a racemic mixture. The bromide ofintermediates 6a and 6b can be converted to the corresponding amine byfirst converting the bromide of 6a and 6b to the corresponding azide byconventional methods, such as those described in Example 1 herein. Theazide is then reduced with a suitable reducing agent, such as sodiumborohydride, under conventional conditions to provide the intermediates7a and 7b, as a racemic mixture. Intermediates 7a and 7b, either as aracemic mixture or separately, may then used as described herein toprepare compounds of Formulas I, II and III wherein each of R¹ and R²are H, respectively, R³ is CH₃ and having the desired R⁷ group. Suchcompounds may be prepared using the schemed shown and describedhereinbelow and/or using the methods described in the Examples providedherein.

As shown, desired R⁹-amide-linked compounds 10 can be prepared asdesired, such as by treatment of aniline 8 with a desired R⁹-carboxylicacid in conjunction with a known acid activating reagent, such as HATU,TBTU or DMTMM (see Method A and B for Example 2) to afford the desiredprotected amide-linked adduct 9. Compound 9 can be deprotected usingknown conditions, such as with a base, such as ammonia or DBU in asuitable solvent, to afford final compounds 10 of Formula I and I-A.

Acid activating groups convert the OH of the acid into a strong leavinggroup “LG.” A “leaving group” which may be a halide such as an iodide,bromide, chloride or fluoride. LG may also be a non-halide moiety suchas an alkylsulfonate or other known groups which generally form anelectrophilic species (E Coupling reactions generally occur more readilyin one or a combination of solvents and a base. Suitable solventsinclude, without limitation, generally non-nucleophilic, anhydroussolvents such as toluene, CH₂Cl₂, THF, DMF, N,N-dimethylacetamide andthe like. The solvent may range in polarity, as appreciated by thoseskilled in the art. Suitable bases include, for example, tertiary aminebases such as DIEA, TEA, carbonate bases such as Na₂CO₃, K₂CO₃, Cs₂CO₃,hydrides such as NaH, KH and the like, alkoxides such as NaOCH₃, and thelike. The base itself may also serve as a solvent. These couplingreactions are generally fast and conversion occurs typically in ambientconditions. However, depending upon the particular substrate, suchreactions may require heat, as appreciated by those skilled in the art.

As shown, desired compounds 12 of Formulas I, I-B, II and III can beprepared as shown in scheme 3. First, compound 8 is deprotected usingconventional techniques, and the aniline adduct 11 can be functionalizedto the desired compound. A desired bicyclic R⁷ group having a suitableleaving group, such as a chloride (Cl) or other aromatic leaving group,can be reacted with compound 11 in the presence of a suitable acid, suchas of sulfuric acid. This allows coupling of the bicyclic heteroaromaticR⁷ group to the amine to form compounds 12 of Formulas I, I-B, II andIII.

EXAMPLES

The Examples, described herein below, represent various exemplarystarting materials, intermediates and compounds of Formulas I-III, whichshould assist in a better understanding and appreciation of the scope ofthe present invention and of the various methods which may be used tosynthesize compounds of Formulas I-III. It should be appreciated thatthe general methods above and specific examples below are illustrativeonly, for the purpose of assistance and of understanding the presentinvention, and should not be construed as limiting the scope of thepresent invention in any manner.

Chromatography:

Unless otherwise indicated, crude product-containing residues werepurified by passing the crude material or concentrate through either aBiotage or Isco brand silica gel column (pre-packed or individuallypacked with SiO₂) and eluting the product off the column with a solventgradient as indicated. For example a description of (330 g SiO₂, 0-40%EtOAc/Hexane) means the product was obtained by elution from the columnpacked with 330 gms of silica, with a solvent gradient of 0% to 40%EtOAc in Hexanes.

Preparative HPLC Method:

Where so indicated, the compounds described herein were purified viareverse phase HPLC using one of the following instruments: Shimadzu,Varian, Gilson; utilizing one of the following two HPLC columns: (a) aPhenomenex Luna or (b) a Gemini column (5 micron or 10 micron, C18,150×50 mm)

A typical run through the instrument included: eluting at 45 ml/min witha linear gradient of 10% (v/v) to 100% MeCN (0.1% v/v TFA) in water(0.1% TFA) over 10 minutes; conditions can be varied to achieve optimalseparations.

Proton NMR Spectra:

Unless otherwise indicated, all ¹H NMR spectra were run on a Brukerseries 300 MHz instrument or a Bruker series 400 MHz instrument. Whereso characterized, all observed protons are reported as parts-per-million(ppm) downfield from tetramethylsilane (TMS) or other internal referencein the appropriate solvent indicated.

Mass Spectra (MS)

Unless otherwise indicated, all mass spectral data for startingmaterials, intermediates and/or exemplary compounds are reported asmass/charge (m/z), having an (M+H⁺) molecular ion. The molecular ionreported was obtained by electrospray detection method (commonlyreferred to as an ESI MS) utilizing a PE SCIEX API 150EX MS instrumentor an Agilent 1100 series LC/MSD system. Compounds having an isotopicatom, such as bromine and the like, are generally reported according tothe detected isotopic pattern, as appreciated by those skilled in theart.

The compounds disclosed and described herein have been named usingeither (1) the naming convention provided with Chem-Draw Ultra 11.0software, available in Chem Office, or (2) by the ISIS database software(Advanced Chemistry Design Labs or ACD software).

Example 1

Synthesis of Intermediate 1i Step 1:(E,Z)-5-bromo-2-fluoro-N′-hydroxybenzimidamide (1b)

5-Bromo-2-fluorobenzonitrile (65 g, 325 mmol, Matrix) was suspended inwater (325 mL) and hydroxyl ammonium chloride (49.7 g, 715 mmol) wasadded. The pH was adjusted to pH=10 by adding 1 M NaOH solution (500mL), followed by 10 M NaOH (5 mL). The suspension was stirred for 1 h atRT and subsequently heated to 100° C. for 3 hs. The reaction mixture wascooled to 0° C., upon which a white solid precipitated, which wasfiltered off. The solid was dissolved in EtOAc and dried over MgSO₄. Thesolvent was removed under reduced pressure to obtain the title compoundas a beige solid (70 g, 300 mmol, 92% yield) which was taken onto thenext step without further purification. MS m/z=232.9 M Calculated forC₇H₆BrFN₂O: 233.04

Step 2: (E,Z)-5-bromo-2-fluoro-N-hydroxybenzimidoyl chloride (1c)

(E,Z)-5-Bromo-2-fluoro-N′-hydroxybenzimidamide (1b, 19.9 g, 85 mmol) wassuspended in water (100 mL). The suspension was cooled to 5° C. andhydrochloric acid (37%, 42.1 ml, 512 mmol) was added, followed by dropwise addition of a solution of sodium nitrite (5.89 g, 85 mmol, Aldrich)in 30 mL water. The internal reaction temperature was maintained below5° C. for 4 h and then raised to 30° C. for 1 h. The reaction mixturewas cooled to RT. The solid was filtered off and dissolved in CH₂Cl₂.The solution was washed with water and dried over MgSO₄. The solvent wasremoved under reduced pressure. The residue was dissolved in Et₂O andhexanes. Upon removing the solvent under reduced pressure a fine yellowsolid formed which was filtered off and dried. The solid was identifiedas title compound (6 g) and taken onto the next step without furtherpurification. MS m/z=253.9 [M+H]⁺. Calculated for C₇H₄BrClFNO: 252.47.

Step 3: 3-(5-bromo-2-fluorophenyl)-5-(chloromethyl)-4,5-dihydroisoxazole(1d-rac)

TEA (0.551 ml, 3.96 mmol, Aldrich) was added drop wise to a stirredsolution of (Z)-5-bromo-2-fluoro-N-hydroxybenzimidoyl chloride (1c, 1 g,3.96 mmol) at 0° C., followed by a solution of allyl chloride (0.968 ml,11.88 mmol, Aldrich) in Et₂O (20 mL). The reaction mixture was allowedto stir at RT for 4 hs. 2 M HCl (10 mL) was added, followed by water andEtOAc. The organic phase was separated and dried over MgSO₄. The solventwas removed under reduced pressure. The crude material was absorbed ontoa plug of silica gel and purified by chromatography eluting with agradient of 3% to 35% EtOAc in hexane, to provide the title compound ascolorless oil (0.604 g, 2.065 mmol, 52.1% yield). MS m/z=293.9 [M+H]⁺.Calculated for C₁₀H₈BrClFNO 292.53.

Step 4: 4-(5-bromo-2-fluorophenyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene(1e-rac)

Potassium t-butoxide (176 mg, 1.572 mmol, Aldrich) was added in smallportions over a time period of 20 min to a solution of3-(5-bromo-2-fluorophenyl)-5-(chloromethyl)-4,5-dihydroisoxazole (200mg, 0.684 mmol, 1d rac) in DMSO (4 mL) cooled with a water bath. Aftercompleted, the reaction was quenched by the addition of ice. EtOAc wasadded and the organic phase was separated. The organic phase was driedover MgSO₄ and the solvent was removed under reduced pressure. The crudematerial was absorbed onto a plug of silica gel and purified bychromatography, eluting with 3% to 5% EtOAc in hexane, to provide thetitle compound as a colorless oil (154 mg, 0.601 mmol, 88% yield). MSm/z=257.9 [M+H]⁺. Calculated for C₁₀H₇BrFNO: 256.07.

Step 5:[1(S,R),4(S,R),5(S,R)]-4-(5-bromo-2-fluorophenyl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(1f-rac)

A solution of4-(5-bromo-2-fluorophenyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (le rac;10 g, 39.1 mmol) in DCM (400 mL) was cooled to −78° C. Boron fluoridediethyl etherate (8.19 ml, 66.4 mmol, Aldrich) was added and thereaction mixture was stirred for 5 min. A solution of methyllithiumlithium bromide (1.5 M solution in Et₂O; 31.2 ml, 46.9 mmol) was addeddrop wise. The temperature was maintained at −78° C. After 2 hs,additional methyllithium lithium bromide solution (31.2 ml, 46.9 mmol)was added drop wise. After 4 hs reaction time, additional boron fluoridediethyl etherate (8.19 ml, 66.4 mmol) and an additional portion of MeLilithium bromide solution (1.5 M solution in Et₂O; 31.2 ml, 46.9 mmol)were added. The reaction mixture was stirred for one more hour at −78°C. The reaction was quenched by the addition of aqueous, saturatedammonium chloride solution. EtOAc was added to the mixture and theorganic phase was separated and dried over MgSO₄. The solvent wasremoved under reduced pressure. The crude material was loaded onto aplug of silica gel and purified by chromatography, eluting with agradient of 5% to 25% EtOAc in hexane, to provide the title compound asa light-yellow oil (2.48 g, 9.11 mmol, 23.34% yield). MS m/z=272.0/274.0M⁺/[M+2]⁺. Calculated for C₁₁H₁₁BrFNO: 272.11

Step 6:[1(S,R),2(S,R)]-2-[(S,R)-1-amino-1-(5-bromo-2-fluorophenyl)ethyl]cyclopropanol(1g-rac)

[1(S,R),4(S,R),5(S,R)]-4-(5-bromo-2-fluorophenyl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(1f rac; 5.197 g, 19.10 mmol) was dissolved in glacial acetic acid (49.6ml, 859 mmol, EMD). Zinc dust (12.49 g, 191 mmol, Aldrich) was addedportion wise at RT. The resulting thick suspension was stirred for 1hour. The reaction mixture was filtered. The filter cake was washed withacetic acid and water. The filtrate was concentrated under reducedpressure. Water was added to the residue and the pH was adjusted to pH10 with aqueous, saturated potassium carbonate solution. A suspensionformed. The solid was filtered off and the filtrate was extracted withCHCl₃, followed by extraction with a solution of 10% MeOH/DCM. Thecombined organic phases were concentrated under reduced pressure. Theresidue was dissolved in DCM and dried over MgSO₄. The solvent wasremoved under reduced pressure to obtain the title compound as a yellowoil (5.044 g, 18.40 mmol, 96% yield), which was used in the next stepwithout further purification. MS m/z=275.9 [M+H]⁺. Calculated forC₁₁H₁₃BrFNO: 274.13.

Step 7:N-[[1(S,R),5(S,R),6(S,R)]-5-(5-bromo-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(1h-rac)

[1(S,R),2(S,R)]-2-[(S,R)-1-amino-1-(5-bromo-2-fluorophenyl)ethyl]cyclopropanol(1g rac; 5.044 g, 18.40 mmol) was dissolved in THF (100 mL) and benzoylisothiocyanate (2.72 mL, 20.24 mmol, Aldrich) was added. The reactionmixture was allowed to stir at RT. After 10 min reaction time, thesolvent was removed under reduced pressure to obtain a yellow foam,which was taken up in acetonitrile (100 mL). A solution of1,3-dicyclohexylcarbodiimide (1 M in DCM, 18.40 mL, 18.40 mmol, Aldrich)was added, followed by triethylamine (0.512 mL, 3.68 mmol, Aldrich). Thereaction mixture was heated to 80° C. for 3 hs. The reaction mixture wascooled to room temperature upon which a solid precipitated. The reactionmixture was filtered and the filtrate was loaded onto a plug of silicagel and purified by chromatography, eluting with a gradient of 5% to 35%EtOAc in hexane, to provide the title compound as a yellow oil (6.438 g,15.97 mmol, 87% yield; 90% purity). MS m/z=403.0 M⁺. Calculated forC₁₉H₁₆BrFN₂O₂: 403.25

Step 8:N-[[1(S,R),5(S,R),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(1i-rac)

A sealable flask was charged with sodium azide (2.322 g, 35.7 mmol,Aldrich), copper(I) iodide (0.453 g, 2.381 mmol, Aldrich) and (+)-sodiumL-ascorbate (0.236 g, 1.190 mmol, Acros). The flask was evacuated andbackfilled with nitrogen gas. A solution ofN-[[1(S,R),5(S,R),6(S,R)]-5-(5-bromo-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(1h rac, 4.8 g, 11.90 mmol) in ethanol (40.5 ml) was added, followed bywater (16.20 ml). The reaction mixture was purged with nitrogen gas for2 min. Trans-N,N′-dimethyl-1,2-cyclohexanediamine (0.563 ml, 3.57 mmol,Aldrich) was added and the reaction mixture was heated to 80° C. for 2.5hs. The reaction was poured into a mixture of aqueous NH₄Cl/NH₄OH (200mL, 9:1) and subsequently extracted with EtOAc. The organic layer waswashed with brine, dried over Na₂SO₄, and concentrated under reducedpressure. The residue was dissolved in MeOH (150 mL) and sodiumborohydride (0.901 g, 23.81 mmol, Aldrich) was added portion wise at RT.Additional portions of sodium borohydride (0.901 g, 23.81 mmol, Aldrich)were added after 1 hs and 2 hs reaction time. Copper(I) iodide (2.2 g,11.9 mmol, Aldrich) was added, followed by an additional portion sodiumborohydride (0.901 g, 23.81 mmol, Aldrich). After 20 min, water wasadded and the reaction mixture was concentrated under reduced pressure.The remaining aqueous solution was extracted with EtOAc. The organicphase was washed with brine and dried over Na₂SO₄. The filtrate wasconcentrated and purified by silica gel column (10-100% EtOAc/hexanes)to afford the title compound (2.55 g, 7.51 mmol, 63.1% yield) as a beigesolid.

MS m/z=340.1 [M+H]⁺. Calculated for C₁₉H₁₈FN₃O₂: 339.36.

Step 9:[1(S,R),5(S,R),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(1k-rac)

A solution ofN-[[1(S,R),5(S,R),6(S,R)]-5-(5-azido-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(1i-rac, 0.7 g, 2.063 mmol) in ammonia (2M solution in methanol; 30.9ml, 61.9 mmol, Aldrich) was heated to 80° C. After 12 hs, additionalammonia (2M solution in methanol; 30.9 ml, 61.9 mmol, Aldrich) was addedand the reaction mixture was heated for 24 hs. The solvent was removedunder reduced pressure and water (50 mL) and 1 N HCl (50 mL) were addedto the residue. The solution was extracted with EtOAc. The aqueousacidic phase was neutralized (pH=7) by the addition of aqueous saturatedbicarbonate solution. The aqueous phase was extracted 4 times withEtOAc. The combined organic phases were dried over MgSO₄ and the solventwas removed under reduced pressure to obtain the title compound (350mg), which was taken onto the next step without further purification. MSm/z=236.1 [M+H]⁺. Calculated for C₁₂H₁₄FN₃O: 235.26

Example 2

Step 1:N-[3-[[1(S,R),5(S,R),6(S,R)]-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl]-4-fluorophenyl]-5-methoxypyrazine-2-carboxamide(2a-rac)

To a solution ofN-[[1(S,R),5(S,R),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(1i-rac; 0.620 g, 1.827 mmol) in DMF (8.0 mL) were added5-methoxypyrazine-2-carboxylic acid (0.282 g, 1.827 mmol, Ark Pharm),1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium3-oxid hexafluorophosphate (1.042 g, 2.74 mmol, Aldrich) anddi-isopropylethylamine (0.636 mL, 3.65 mmol, Aldrich). The reaction wasstirred at ambient temperature for 25 min. Water (50 mL) was added andthe resulting suspension was stirred for 15 min, and then filtered. Thesolid was dried to afford the title compound as a yellow solid (0.75 g,1.577 mmol, 86% yield). MS m/z=476.0 [M+H]⁺. Calculated for C₂₅H₂₂FN₅O₄:475.47

Step 2:N-[3-[(1(S,R),5(S,R),6(S,R))-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl]-4-fluorophenyl]-5-methoxypyrazine-2-carboxamide(Example 2b-rac)

A sealable vial was charged withN-[3-[[1(S,R),5(S,R),6(S,R)]-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl]-4-fluorophenyl]-5-methoxypyrazine-2-carboxamide(2a rac; 1.28 g, 2.69 mmol) and ammonia (2.0M solution in methanol; 30ml, 60.0 mmol, Aldrich). The reaction mixture was heated to 80° C. for34 hs. The reaction mixture was filtered. The filter cake was rinsedwith MeOH and dried to afford the title compound as a tan solid (230 mg,0.62 mmol, 46% yield).

MS m/z=372.0 [M+H]⁺. Calculated for C₁₈H₁₈FN₅O₃: 371.37

¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.36 (td, J=6.36, 2.74 Hz, 1H) 0.59 (dt,J=9.44, 6.24 Hz, 1H) 1.57 (s, 3H) 1.69 (dd, J=6.75, 3.23 Hz, 1H)3.96-4.07 (m, 4H) 5.36 (s, 2H) 7.11 (dd, J=11.74, 8.80 Hz, 1H) 7.70 (dt,J=8.22, 3.72 Hz, 1H) 8.02 (dd, J=7.24, 2.74 Hz, 1H) 8.40 (d, J=1.37 Hz,1H) 8.88 (d, J=1.17 Hz, 1H) 10.33 (s, 1H)

Step 3:N-(3-((1S,5S,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(Example 2b-A) andN-(3-((1R,5R,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(Example 2b-B)

N-[3-[(1(S,R),5(S,R),6(S,R))-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl]-4-fluorophenyl]-5-methoxypyrazine-2-carboxamide(2b rac, 230 mg) was subjected to chromatography using supercritical CO₂(additives 40% methanol with 20 mM NH₃) on a OD-H column (21×250 mm, 5μm) eluting at a flow rate 70 ml/min (100 bar pressure, 40° C. columntemperature). The first peak (retention time=1.19 min) provided(1S,5S,6S)-5-(2-fluoro-5-((3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 2b-A, 108 mg, 0.28 mmol, 47% yield; 99% de; 99% ee) as a tanpowder. The second peak (retention time=2.28 min) provided(1R,5R,6R)-5-(2-fluoro-5-((3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 2b-B; 106 mg, 0.28 mmol, 46% yield; 99% de; 99% ee) as a tanpowder.

MS m/z=372.1 [M+H]⁺. Calculated for C₁₈H₁₈FN₅O₃: 371.37 (for bothenantiomers)

¹H NMR (Example 2-A; 400 MHz, CHLOROFORM-d) δ ppm 0.51 (td, J=6.94, 2.93Hz, 1H) 0.69 (dt, J=9.68, 6.60 Hz, 1H) 0.79-0.95 (m, 1H) 1.72 (s, 4H)1.79-1.91 (m, 1H) 3.95-4.14 (m, 4H) 7.06 (dd, J=11.44, 8.71 Hz, 1H) 7.65(dd, J=6.85, 2.74 Hz, 1H) 7.97-8.05 (m, 1H) 8.14 (d, J=1.17 Hz, 1H) 9.02(d, J=1.17 Hz, 1H) 9.51 (br. s., 1H)

¹H NMR (Example 2-B; 400 MHz, CHLOROFORM-d) δ ppm 0.51 (td, J=6.94, 2.93Hz, 1H) 0.69 (dt, J=9.83, 6.63 Hz, 1H) 1.72 (s, 4H) 1.84 (dtd, J=10.32,6.97, 6.97, 3.91 Hz, 1H) 3.95-4.13 (m, 4H) 7.06 (dd, J=11.35, 8.80 Hz,1H) 7.65 (dd, J=6.94, 2.84 Hz, 1 H) 7.95-8.05 (m, 1H) 8.14 (d, J=1.17Hz, 1H) 9.02 (d, J=1.17 Hz, 1H) 9.51 (br. s., 1H)

Example 3

Step 1: 5-(Chloromethyl)-3-methyl-4,5-dihydroisoxazole (3b-rac)

To a solution of acetaldehyde oxime (2.070 mL, 33.9 mmol, Alrich) in THF(30 mL)/Chloroform (15 mL) was added N-chlorosuccinimide (4.75 g, 35.6mmol, Aldrich) in one portion, followed by drop wise addition ofpyridine (1.369 mL, 16.93 mmol, Aldrich) at rt. After completed additionthe reaction mixture was allowed to stir at RT for 4 hs. The solid wasfiltered off and the filtrate was cooled to 0° C. Additional solidprecipitated out. The solution was decanted off and concentrated underreduced pressure to give a light-yellow oil, which was taken onto thenext step assuming 100% theoretical yield (according to WO2008062739).The oil was dissolved in Et₂O (100 mL) and THF (5 mL). Allyl chloride(8.28 mL, 102 mmol, Aldrich) was added, followed by triethylamine (4.71mL, 33.9 mmol, Aldrich). The reaction mixture was cooled to 0° C. Thereaction mixture was allowed to warm up to RT and stirred for 3 days.The reaction mixture was filtered and the filtrate was washed withaqueous saturated ammonium chloride solution, followed by water. Theorganic phase was separated and dried over MgSO₄. The solvent wasremoved under reduced pressure. The crude material was loaded onto aplug of silica gel and purified by chromatography eluting with agradient of 5% to 35% EtOAc in hexane, to provide a yellow oil, whichwas dissolved in EtOAc and washed with aqueous CuSO₄ solution. Theorganic phase was separated and dried over MgSO₄. The solvent wasremoved under reduced pressure to obtain the title compound as a yellowoil (1.9 g, 14.22 mmol, 42.0% yield). MS m/z=134.0 [M+H]⁺. Calculatedfor C₅H₈ClNO: 133.58

Step 2: [1(S,R),5(S,R)]-4-methyl-2-oxa-3-azabicyclo[3.1.0]hex-3-ene(3c-rac)

Potassium 2-methylpropan-2-olate (63.8 g, 568 mmol, Aldrich) was addedportion wise to a solution of5-(chloromethyl)-3-methyl-4,5-dihydroisoxazole (3b rac; 33 g, 247 mmol)in DMSO (618 mL) cooled with a water bath. The reaction was quenchedafter 30 min by the addition of ice. Et₂O was added and the organicphase was separated. The organic phase was washed with aqueous saturatedLiCl solution and dried over MgSO₄. The Et₂O was removed by distillationunder ambient pressure. The remaining liquid was distilled under reducedpressure and the title compound was obtained as a colorless oil (13 g,134 mmol, 54.2% yield; boiling point 85° C. at 35 Torr). GCMS m/z=97 M⁺.Calculated for C₅H₇NO: 97.12

Step 3:[1(S,R),4(R,S),5(S,R))-4-(5-bromo-2-fluorophenyl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(3d-rac)

A solution of 4-bromo-1-fluoro-2-iodobenzene (8.52 g ml, 28.3 mmol,Matrix Scientific) in ether (20 ml) was cooled to −78° C. before addinga solution of n-butyllithium (2.5M in hexanes; 11.33 ml, 28.3 mmol,Aldrich) drop wise. The reaction mixture was stirred at −78° C. for 30minutes. In a separate flask, a solution of[1(S,R),5(S,R)]-4-methyl-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (1.1 g,11.33 mmol, 3c rac) in toluene (110 ml) was cooled to −78° C. beforeadding boron fluoride diethyl etherate (1.677 ml, 13.59 mmol, Aldrich)drop wise. The solution was stirred at −78° C. for 15 minutes. Thearyl-lithium solution was added to the isoxazoline solution drop wisevia cannula. Upon complete addition the reaction was warmed to RT andstirred for 16 hours. The reaction was quenched with aqueous saturatedammonium chloride solution and diluted with water and EtOAc. The aqueouslayer was washed with additional EtOAc and the organic layers werecombined, washed with brine, dried over magnesium sulfate, andconcentrated under reduced pressure. The crude residue was purified bysilica gel flash chromatography using a gradient of 5-30% EtOAc inHexanes to afford the title compound (1.969 g, 7.24 mmol, 63.9% yield).MS m/z=272.0 [M+H]⁺. Calculated for C₁₁H₁₁BrFNO: 272.11

Step 4:[1(S,R),2(S,R)]-2-[(R,S)-1-amino-1-(5-bromo-2-fluorophenyl)ethyl]-cyclopropanol(3e-rac)

[1(S,R),4(R,S),5(S,R))-4-(5-bromo-2-fluorophenyl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(2.5 g, 9.11 mmol, 3d rac) was dissolved in glacial acetic acid. (44.7ml, 775 mmol, Aldrich). Zinc dust (5.96 g, 91 mmol, Aldrich) was addedportion wise. The reaction was heated to 40° C. for 3.5 hours. Thereaction was cooled to RT, filtered and the filter cake was washed withadditional HOAc. The filtrate was concentrated under reduced pressure.The crude residue was dissolved in water and the solution was basifiedto pH=10 by the addition of saturated sodium bicarbonate aqueoussolution and a few drops of 2M NaOH solution. The basic solution wasextracted with chloroform three times. The combined organic layers werewashed with brine, dried over magnesium sulfate and concentrated underreduced pressure to afford the title compound as a yellow solid. (2.4209g, 8.83 mmol, 97% yield). MS m/z=274 [M+H]⁺. Calculated for C₁₁H₁₃BrFNO:274.129

Step 5:N-[[1(S,R),5(R,S),6(S,R)]-5-(5-bromo-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(3f-rac)

The title compound was prepared using a procedure similar to thatdescribed in step 7 for the synthesis of 1h-rac, but using[1(S,R),2(S,R)]-2-[(R,S)-1-amino-1-(5-bromo-2-fluorophenyl)ethyl]-cyclopropanol(3e-rac). MS m/z=403.0 [M+H]⁺. Calculated for C₁₉H₁₆BrFN₂O₂: 403.245

Step 6:N-[[1(S,R),5(R,S),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(3g-rac)

The title compound was prepared using a procedure similar to thatdescribed in step 8 for the synthesis of 1i-rac, but usingN-[[1(S,R),5(R,S),6(S,R)]-5-(5-bromo-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(3f-rac). MS m/z=340.1 [M+H]⁺. Calculated for C₁₉H₁₈FN₃O₂: 339.364

Step 7:N-[[1(S,R),5(R,S),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(3h-rac)

The title compound was prepared using a procedure similar to thatdescribed in step 9 for the synthesis of 1k-rac, but usingN-[[1(S,R),5(R,S),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(3g-rac). MS m/z=236.0 [M+H]⁺. Calculated for C₁₂H₁₄FN₃O: 235.25

Step 8:(1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(3h-A) and(1S,5R,6S)-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(3h-B)

N-[[1(S,R),5(R,S),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(3h-rac) was subjected to chromatography using supercritical CO₂(additives 22% EtOH with 20 mM NH₃) on a CHIRALPAK AD-H SFC column(21×250 mm, 5 μm) eluting at a flow rate 70 ml/min (100 bar pressure,40° C. column temperature). The first peak (retention time=1.57 min)provided (Example 3h-A, 454 mg, 1.930 mmol, 41% yield; 99% de; 99% ee)as a white powder. The second peak (retention time=2.31 min) provided(Example 3h-B, 464 mg, 1.972 mmol, 42% yield; 99% de; 99% ee) as a whitepowder. MS m/z=236.2 [M+H]⁺. Calculated for C₁₂H₁₄FN₃O=235.112 (for bothenantiomers)

¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.76-0.84 (m, 1H) 0.94 (td, J=6.80,2.64 Hz, 1H) 1.58 (d, J=1.37 Hz, 3H) 1.71-1.80 (m, 1H) 3.54 (br. s, 4H)3.88 (ddd, J=7.48, 6.02, 2.74 Hz, 1H) 6.51 (dt, J=8.22, 3.42 Hz, 1H)6.73 (dd, J=6.85, 2.93 Hz, 1H) 6.83 (dd, J=11.84, 8.51 Hz, 1H)

Example 4

Step 1:[1(R,S),4(S,R),5(R,S)]-4-(6-bromo-3-fluoropyridin-2-yl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(4a rac)

A solution of n-butyllithium solution, (1.6M in hexane; 3.22 ml, 5.15mmol) was added dropwise to solution of 2-bromo-5-fluoropyridine (0.906g, 5.15 mmol) in Et₂O (20 mL; anhydrous) at −78 C. The reaction mixturewas allowed to stir for 25 min at −78° C. An additional flask wascharged with 4-methyl-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (0.25 g, 2.57mmol, 3c-rac) and toluene (20 mL). The solution was cooled to −78 C andboron fluoride diethyl etherate (0.477 ml, 3.86 mmol) was added. Thesolution was stirred for 15 minutes and then transferred via cannula tothe heteroaryl lithium solution. Upon complete addition the reactionmixture was stirred at −78 C for 20 min and then allowed to warmgradually to 10° C. After 1 h, the reaction mixture was quenched by theaddition of aq. sat ammonium chloride solution. EtOAc was added and theorganic extract was washed with brine and dried over MgSO4. The solutionwas filtered and concentrated in vacuo to give the crude material. Thecrude material was absorbed onto a plug of silica gel and purified bysilica gel chromatography, eluting with a gradient of 5% to 45% EtOAc inhexane, to provide the title compound as a single diastereoisomer (0.226g, 0.828 mmol, 32.1% yield, >95% de). MS m/z=274.9 [M+H]⁺.

Steps 2: [(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(6-bromo-3-fluoropyridin-2-yl)ethyl)cyclopropanol(4b rac)

A flask was charged with[1(R,S),4(S,R),5(R,S)]-4-(6-bromo-3-fluoropyridin-2-yl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(14.14 g, 51.8 mmol, 4a rac) and TFA (105 ml, 1363 mmol). After 5 min,the solution was cooled to 0 C and zinc dust (33.9 g, 518 mmol) wasadded portion wise. The reaction mixture was filtered after 10 minthrough celite and the filter cake was washed with TFA. The filtrate waspoured into ice water and the pH was adjusted to pH=12 with 5N NaOHsolution. The aqueous mixture was extracted twice with EtOAc. Thecombined organic layers were washed with brine and dried over MgSO₄. Thefiltrate was concentrated under reduced pressure to afford the titlecompound (13.76 g, 50.0 mmol, 97% yield) as a yellow solid. MS m/z=275.0[M+H]⁺.

Step-3: N-[(1R,S), (5S,R),(6R,S)]-5-(6-bromo-3-fluoropyridin-2-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(4c rac)

The title compound was prepared using a procedure similar to thatdescribed in step 7 for the synthesis of 1h-rac, but using [(1R,S),(2R,S)]-2-4S,R)-1-amino-1-(6-bromo-3-fluoropyridin-2-yl)ethyl)cyclopropanol(4b rac). MS m/z=403.9 [M+H]⁺.

Step 4: [(1R,S), (5S,R),(6R,S)]-5-(6-bromo-3-fluoropyridin-2-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(4d rac)

To a solution of N-[(1R,S), (5S,R),(6R,S)]-5-(6-bromo-3-fluoropyridin-2-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(3 g, 7.42 mmol, 4c-rac) in MeOH (49.5 ml) was added DBU (3.36 mL, 22.3mmol). The reaction mixture was heated to 70° C. over night. Uponcooling, a white solid precipitated out, which was filtered off. Thesolid was taken up in EtOAc (70 mL), washed with saturated ammoniumchloride solution (70 mL) and brine. The organic layer was dried overmagnesium sulfate and concentrated under reduced pressure to afford thetitle compound (1.67 g, 5.56 mmol, 75.0% yield) as a fine white solid.

MS m/z=301.9 [M+H]

Example 5

Step 1:[1(S,R),4(R,S),5(S,R)]-4-(5-Bromo-2-fluoropyridin-3-yl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(5a rac)

A solution of 3,5-dibromo-2-fluoropyridine (4.88 g, 19.14 mmol) andtoluene (55 mL) under argon atmosphere was cooled to 0° C. A solution ofisopropylmagnesium chloride lithium chloride (1.3 M solution in THF,14.8 ml, 19.24 mmol) was added dropwise. The resulting mixture wasstirred at 0° C. for 30 min and then cooled to −78° C. In a separateflask, a solution of 4-methyl-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (3crac, 0.93 g, 9.57 mmol) and toluene (53 mL) under argon atmosphere wascooled to −78° C. and boron trifluoride diethyl etherate (3.54 ml, 28.7mmol) was added dropwise. The reaction mixture was stirred at −78° C.for 15 min and added via syringe to the3,5-dibromo-2-fluoropyridine-Grignard mixture. The resulting mixture wasallowed to warm to RT and stirred for additional 2 h. The reaction wasquenched with aqueous saturated NH₄Cl solution and partitioned betweenEtOAc and water. The organic layer was dried over MgSO₄). The filtratewas concentrated in vacuo and the residue was purified by silica gelchromatography (0% to 25% EtOAc/Hexanes) to afford the title compound asa a tan solid. MS m/z=272.9, 275.0 [M+H]⁺.

Step 2 and 3:N-[(1(S,R),5(R,S),6(S,R)]-5-(5-Bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(5c rac)

The title compound was prepared using procedures similar to thatdescribed in steps 6 and 7 for the synthesis of 1h-rac, but using[1(S,R),4(R,S),5(S,R)]-4-(5-Bromo-2-fluoropyridin-3-yl)-4-methyl-2-oxa-3-azabicyclo[3.1.0]hexane(5a rac). MS m/z=404.0, 406.0 [M+H]⁺.

Step 4: tert-Butylbenzoyl[(1(S,R),5(R,S),6(S,R)]-5-(5-bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(5d rac)

To a solution ofN-((1(S,R),5(R,S),6(S,R))-5-(5-bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(5c rac, 0.718 g, 1.77 mmol) in DCM (8.9 ml, 1.77 mmol) under argonatmosphere was added di-tert-butyl dicarbonate (0.46 g, 2.13 mmol),followed by 4-(dimethylamino)-pyridine (0.11 g, 0.88 mmol). The reactionmixture was stirred at room temperature for 1 h. CH₂Cl₂ was added. Thephases were separated and the aqueous layer was back-extracted withCH₂Cl₂. The combined organic extracts were washed with water, dried overMgSO₄ and the filtrate was concentrated in vacuo. The residue waspurified by silica gel chromatography (0% to 15% EtOAc/Hexanes) affordedthe title compound as a colorless foam. MS m/z=503.9, 506.0 [M+H]⁺.

Step 5: tert-butyl[(1(S,R),5(R,S),6(S,R)-5-(5-bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]carbamate(5e rac)

To a solution of tert-butyl benzoyl[(1(S,R),5(R,S),6(S,R))-5-(5-bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]carbamate(5d rac; 486 mg, 0.964 mmol) in MeOH (6 mL) was added potassiumcarbonate (0.029 mL, 0.482 mmol) and the resulting reaction mixture wasstirred at RT for 30 min. The reaction mixture was cooled to −78° C. andquenched with aqueous saturated ammonium chloride solution, followed byextraction with EtOAc (2×20 mL). The combined organic extracts weredried over MgSO₄ and concentrated in vacuo. The residue was purified bysilica gel flash column chromatography (0%-100% EtOAc/hexane) to give368 mg of the title compound as a white solid. MS (ESI, positive ion)m/z: 400.1, 401.9 (M+H).

Step 6:(1(S,R),5(R,S),6(S,R))-5-(5-bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(5f rac)

To a solution of tert-butyl((1(S,R),5(R,S),6(S,R)-5-(5-bromo-2-fluoropyridin-3-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(5e rac, 368 mg, 0.919 mmol) in DCM (2.5 mL) was added trifluoroaceticacid (0.956 mL, 12.87 mmol). The resulting mixture was stirred at roomtemperature for 45 min. Additional trifluoroacetic acid (0.5 mL) wasadded and the mixture reaction was stirred at RT for 1 h. The reactionmixture was concentrated under reduced pressure and the residue wasdissolved in DCM (10 mL). The solution was cooled to −50° C. and aqueoussaturated NaHCO₃ solution (4 mL) was added dropwise. The reactionmixture was stirred at RT for 10 min, followed by extraction with DCM(2×15 mL). The combined organic extracts were dried over MgSO₄ andconcentrated in vacuo. The residue was absorbed onto silica gel.Purification by silica gel flash column chromatography (0%-20% ammoniain MeOH 2M/DCM) gave 267 mg of the title compound as a light yellowsolid. MS (ESI, positive ion) m/z: 300.0, 302.0 (M+H).

Example 6

Step 1: 5-(Chloromethyl)-3-(fluoromethyl)-4,5-dihydroisoxazole (6b rac)

To a solution of (5-(chloromethyl)-4,5-dihydroisoxazol-3-yl)methanol(1.58 g, 10.56 mmol, 6a rac, Tetrahedron 1986, 42, 5267) in DCM (30 mL)at −78° C. was added (diethylamino)sulfur trifluoride (1.60 ml, 12.11mmol). The reaction mixture was stirred at −78° C. for 10 min, warmedfrom −78° C. to room temperature over 15 min, stirred at roomtemperature for 1 h and quenched with saturated aq. saturated NaHCO₃solution. The reaction mixture was diluted with diethyl ether and water.The aqueous phase was extracted with diethyl ether (4×) and the combinedorganic extracts were washed with brine (1×), dried over MgSO₄,filtered, and concentrated in vacuo to give a dark red oil. Purificationby flash column chromatography on silica gel (20% diethyl ether inpentane) gave the title compound (0.79 g, 49% yield).

Step 2: 4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6c rac)

To a solution of 5-(chloromethyl)-3-(fluoromethyl)-4,5-dihydroisoxazole(0.78 g, 5.13 mmol, 6b rac) in THF (25 mL) at 0° C. was added potassiumtert-butoxide, (1.0M solution in THF; 5.50 ml, 5.50 mmol). The reactionmixture was stirred at 0° C. for 20 min and additional potassiumtert-butoxide solution (0.50 mL) was added. Stirring was continued at 0°C. for additional 20 min. The reaction mixture was warmed to RT, stirredfor 20 min and quenched with saturated NH₄Cl solution. The reactionmixture was diluted with diethyl ether and water. The aqueous phase wasextracted with diethyl ether (3×). The combined organic extracts werewashed with brine and dried over MgSO4. The filtrate was concentratedunder reduced pressure to give a dark red oil. Purification by flashcolumn chromatography on silica gel (20% diethyl ether in pentane) gavethe title compound (0.57 g, 96% yield).

Step 3:[1(R,S),4(S,R),5(R,S)]-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(6d rac)

To a solution of 4-bromo-1-fluoro-2-iodobenzene (22.1 g, 73.6 mmol) inEt₂O (150 mL) at −78° C. was added n-butyllithium (1.6 M in hexane, 46.0mL, 73.6 mmol). The solution was stirred at −78° C. for 15 min. Anadditional flask was charged with a solution of [1(S,R),5(S,R)]-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6crac, 4.21 g, 36.6 mmol) and boron trifluoride diethyl etherate (4.65 mL,36.7 mmol) in PhMe (170 mL) at −78° C. The second solution was addeddropwise via cannula over 10 min to the aryl lithium solution. Thereaction mixture was stirred at −78° C. for 30 min and quenched withaqueous saturated NH₄Cl solution. The reaction mixture was warmed to RTand diluted with EtOAc and water. The aqueous phase was extracted withEtOAc (2×) and the combined organic extracts were washed with brine anddried over MgSO₄. The filtrate was concentrated under reduced pressureand the residue was purified by silica gel flash column chromatography(5% to 20% EtOAc in hexanes) to give the title compound (9.58 g, 33.0mmol, 90% yield) as a yellow oil. LC/MS (ESI⁺) m/z=289.9.0 (M+H).Calculated for C₁₁H₁₀BrF₂NO 289.0.

Steps 4-5: N-(((1R,S), (5S,R),(6R,S))-5-(5-bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(6f-rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2 and 3 for the synthesis of 4c rac, but using[1(R,S),4(S,R),5(R,S)]-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(6d rac). MS m/z=422.9 [M+H]⁺.

Step 6:[1(S,R),5(R,S),6(S,R)]-5-(5-Bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6g-rac)

The title compound was prepared following a procedure similar to thatdescribed in step 4 for the synthesis of 4d rac, but using N-(((1R,S),(5S,R),(6R,S))-5-(5-bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(6f-rac) MS m/z=316.9 [M+H]⁺. Calculated for C₁₂H₁₁BrF₂N₂O 316.0.

Step 7:(1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6g-A) and(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6g-B)

[1(S,R),5(R,S),6(S,R)]-5-(5-Bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6g-rac, 493 mg, 1.39 mmol) was subjected to chromatography usingsupercritical CO₂ (additives 35% MeOH with 20 mM NH₃) on a Chiralpak ICH(20×250 mm, 5 μm) eluting at a flow rate 75 mL/min (100 bar pressure,ambient column temperature).

The first peak (retention time=1.97 min) provided (Example 6g-A; 220 mg,0.69 mmol, 45% yield; >99% de; >99% ee) as a light yellow solid. LC/MS(ESI⁺) m/z=317.0 (M+H). Calculated for C₁₂H₁₁BrF₂N₂O 316.0.

¹H NMR (CD₃OD) δ: 7.59 (dd, J=7.0, 2.5 Hz, 1H), 7.51 (ddd, J=8.6, 4.2,2.6 Hz, 1H), 7.11 (dd, J=11.7, 8.6 Hz, 1H), 4.67-4.80 (m, 1H), 4.51-4.65(m, 1H), 3.96-4.12 (m, 1H), 1.63-1.80 (m, 1H), 1.17 (td, J=6.8, 2.6 Hz,1H), 0.92 (dt, J=9.4, 6.7 Hz, 1H). The second peak (retention time=3.00min) provided (Example 6g-B; 210 mg, 0.66 mmol, 43% yield; >99% de; >99%ee) as a light yellow solid. MS m/z=316.9 [M+H]⁺. Calculated forC₁₂H₁₁BrF₂N₂O 316.0. ¹H NMR (CD₃OD) δ: 7.59 (dd, J=7.0, 2.3 Hz, 1H),7.45-7.55 (m, 1H), 7.10 (dd, J=11.7, 8.8 Hz, 1H), 4.67-4.79 (m, 1H),4.51-4.65 (m, 1H), 3.95-4.16 (m, 1H), 1.60-1.86 (m, 1H), 1.17 (td,J=6.7, 2.4 Hz, 1H), 0.84-1.00 (m, 1H).

Step 8:(1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6h-B)

To a mixture of(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6g-B, 0.61 g, 1.9 mmol), sodium azide (0.388 g, 5.96 mmol), (+)-sodium1-ascorbate (0.080 g, 0.41 mmol), copper(I) iodide (0.086 g, 0.45 mmol)and (1R,2R)-(−)-N,N″-dimethylcyclohexane-1,2-diamine (0.075 mL, 0.47mmol) under argon atmosphere were added EtOH (2.40 mL) and water (1.2mL). The reaction mixture was heated at 70° C. for 1.5 h. The cooledreaction mixture was poured into a mixture of 10:1 NH₄Cl/ammoniumhydroxide and diluted with CH₂Cl₂. The aqueous layer was extracted withCH₂Cl₂ (3×) and the combined organic extracts were washed with aqueoussaturated NH₄Cl solution. The solution was dried over MgSO₄ and thefiltrate was concentrated in vacuo to give a yellow solid, which wasdissolved in THF (8.4 mL) and water (2.8 mL). Trimethylphosphine (1.0 Msolution in THF, 1.924 mL, 1.924 mmol) was added and the reactionmixture was stirred at RT for 20 min. The reaction was diluted withCH₂Cl₂ and water. The phases were separated and the aqueous layer wasextracted with CH₂Cl₂. The combined organic extracts were dried overMgSO₄ and the filtrate was purified by silica gel flash columnchromatography (0% to 5% 2 M NH₃ in MeOH/CH₂Cl₂) to afford the titlecompound (0.4473 g, 1.766 mmol, 92% yield) as a maize color solid. MSm/z=254.0 [M+H]⁺. Calculated for C₁₂H₁₃F₂N₃O 253.1.

Step 9: [(1R,S),(5S,R),(6R,S)]-5-(5-amino-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6h-rac)

The title compound was prepared following a procedure similar to thatdescribed in step 8 for the synthesis of(1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6h-B), but using [1(S,R),5(R,S),6(S,R)]-5-(5-Bromo-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(6g-rac) MS m/z=254.0 [M+H]⁺.

Example 7

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(6-Chloro-3-fluoropyridin-2-yl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(7a rac)

A solution of 2-chloro-5-fluoropyridine (1.8 ml, 17.75 mmol) in diethylether (50 mL) under nitrogen atmosphere was cooled to −78 C. A solutionof n-butyllithium (2.5 M in hexanes, 6.8 ml, 17.00 mmol) was addeddropwise and the solution was stirred for 20 minutes. In a separateflask, 4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (1.0 g, 8.69mmol, 6c rac) was dissolved in dry toluene (10 mL) and cooled to −78 Cunder nitrogen atmosphere. Boron fluoride diethyl etherate (1.2 ml, 9.72mmol) was added dropwise and the reaction mixture was stirred for 5minutes. The solution of the pyridyl anion was transferred to theisoxazole/boron trifluoride mixture via cannula. The reaction mixturewas stirred for additional 25 minutes and then quenched by addition ofsaturated ammonium chloride solution (10 mL). The reaction mixture wasallowed to warm to rt and diethyl ether (200 mL) was added. The organiclayer was separated, washed with brine (70 mL) and dried over magnesiumsulfate. The filtrate was concentrated under reduced pressure and thecrude residue was purified using silica chromatography (0-100% ethylacetate/hexanes) to give the title compound (1.30 g, 5.27 mmol, 60.7%yield. >95% de). MS m/z=246.9 [M+H]⁺.

Step 2: [(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(6-chloro-3-fluoropyridin-2-yl)-2-fluoroethyl)cyclopropanol(7b rac)

The title compound was prepared using a procedure similar to thatdescribed in step 2 for the synthesis of 4b-rac, but using [(1R,S),(4S,R),(5R,S)]-4-(6-Chloro-3-fluoropyridin-2-yl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(7a rac). MS m/z=249.1 [M+H]⁺.

Step 3: N-[(1R,S), (5S,R),(6R,S)]-5-(6-Chloro-3-fluoropyridin-2-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(7c rac)

The title compound was prepared using a procedure similar to thatdescribed in step 7 for the synthesis of 1h-rac, but using [(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(6-chloro-3-fluoropyridin-2-yl)-2-fluoroethyl)cyclopropanol(7b rac). MS m/z=377.9 [M+H]⁺.

Step 4: N-[(1R,S), (5S,R),(6R,S)]-5-(6-amino-3-fluoropyridin-2-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(7d rac)

The title compound was prepared using a procedure similar to thatdescribed in step 8 for the synthesis of 1i-rac, but using -[(1R,S),(5S,R),(6R,S)]-5-(6-Chloro-3-fluoropyridin-2-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(7c rac). MS m/z=359.0 [M+H]⁺.

Example 8

Step 1:[1(S,R),4(R,S),5(S,R)]-4-(5-bromo-2-fluoropyridin-3-yl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(8a rac)

To a solution of diisopropylamine (3.65 mL, 26.1 mmol) in THF (25 mL)under nitrogen atmosphere, cooled to 0° C., was added a solution ofbutyllithium (1.6M in hexane, 16.29 mL, 26.1 mmol) dropwise. Aftercompleted addition, the reaction mixture was stirred at 0° C. for 10min. Then, the mixture was cooled to −78° C. and5-bromo-2-fluoropyridine (3.00 mL, 26.1 mmol) was added dropwise. Thereaction mixture was stirred at −78° C. for 30 min, followed by theaddition of N,N,N′,N′-tetra-methyl-ethylenediamine (3.90 mL, 26.1 mmol).The resulting mixture was stirred at −78° C. for 5 min. In an additionalflask, a solution of[1(R,S),5(R,S)]-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6crac, 1.5 g, 13.03 mmol) in toluene (37.5 mL) was treated with borontrifluoride diethyl etherate (1.608 mL, 13.03 mmol) at −78° C. undernitrogen atmosphere. After 10 min, this solution was added dropwise viacannula to the aryl lithium solution. The resulting reaction mixture wasthen stirred at −78° C. for 1 h. The reaction was quenched with aqueoussaturated NH₄Cl solution and diluted with EtOAc. The organic extract wasdried over MgSO₄ and the filtrate was concentrated in vacuo. The residuewas absorbed onto silica gel and purified by silica gel flash columnchromatography (0%-35% EtOAc/heptane) to give 1259 mg of the titlecompound as a light yellow solid. MS (ESI, positive ion) m/z: 290.9,292.9 (M+H).

Step 2-6:[1(S,R),5(R,S),6(S,R)]-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2 to 6 for the synthesis of 6f rac, but using[1(S,R),4(R,S),5(S,R)]-4-(5-bromo-2-fluoropyridin-3-yl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(8a rac) MS (ESI, positive ion) m/z: 317.9, 320.9 (M+H).

Step 7:(1S,5R,6S)-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f-A) and(1R,5S,6R)-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f-B)

[1(S,R),5(R,S),6(S,R)]-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f rac, 345 mg) was subjected to chromatography using supercritical CO₂(25% MeOH) on a IC-H column (21.2×250 nm, 5 μm) eluting at a flow rate80 mL/min (209 bar, 40° C. column temperature). The first peak(retention time=3.7 min) provided(1S,5R,6S)-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f-A, 108 mg, 0.40 mmol, 63% yield, 99% de; 99% ee) as a white solid.MS (ESI, positive ion) m/z: 317.9, 320.9 (M+H).

¹H NMR (MeOH) δ: 8.22-8.24 (m, 1H), 8.06 (dd, J=8.6, 2.5 Hz, 1H),4.52-4.76 (m, 2H), 4.04-4.09 (m, 1H), 1.64-1.71 (m, 1H), 1.13 (td,J=6.8, 2.6 Hz, 1H), 0.93 (dt, J=9.6, 6.7 Hz, 1H). The second peak(retention time=4.5 min) provided(1R,5S,6R)-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f-B, 112 mg, 0.352 mmol, 65% yield, 99% de; 99% ee) as a light yellowsolid. MS (ESI, positive ion) m/z: 317.9, 320.9 (M+H).

¹H NMR (MeOH) δ: 8.24-8.27 (m, 1H), 8.08 (dd, J=8.6, 2.5 Hz, 1H),4.54-4.80 (m, 2H), 4.12 (br. s., 1H), 1.67-1.74 (m, 1H), 1.13-1.20 (m,1H), 0.97 (dt, J=9.5, 6.7 Hz, 1H)

Step 8:(1R,5S,6R)-5-(5-amino-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8g-B)

A sealable vial was charged with(1R,5S,6R)-5-(5-bromo-2-fluoropyridin-3-yl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(8f-B, 0.1016 g, 0.319 mmol), trifluoroacetamide (0.072 g, 0.639 mmol),copper(I) iodide (0.018 g, 0.096 mmol) and potassium carbonate (0.177 g,1.278 mmol), followed by dioxane (1.8 mL) andtrans-N,N′-dimethylcyclohexane-1,2-diamine (0.015 mL, 0.096 mmol). Thereaction mixture was purged with nitrogen for 5 min and then heated at120° C. for 20 h. The cooled reaction mixture was diluted with CH₂Cl₂and washed with aqueous saturated NaHCO₃ solution. The layers wereseparated and the aqueous layer was extracted with 15% MeOH/CH₂Cl₂. Thecombined organic extracts were dried over MgSO₄ and the filtrate wasconcentrated in vacuo. The residue was purified by silica gel flashchromatography (1% to 10% MeOH/CH₂Cl₂) afforded the title compound(0.061 g, 0.240 mmol, 75% yield) as a tan amorphous solid. MS (ESI,positive ion) m/z: 255.1 (M+H)

Example 9

Step 1:[(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-chlorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(9a rac)

A flame dried round bottom flask was charged with4-bromo-1-chloro-2-iodobenzene (33.1 g, 104 mmol) and Et₂O (206 mL). Thesolution was cooled to −78° C. and a solution of n-butyllithium solution(2.5 M in hexanes, 41.7 mL, 104 mmol) was added dropwise. The reactionmixture was stirred at −78° C. for 15 minutes. A second, flame driedround bottom flask was charged with a solution of4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6c rac; 6 g, 52.1mmol) in toluene (229 mL) and cooled to −78° C. Boron trifluoridediethyl etherate (6.61 mL, 52.1 mmol) was added, the reaction mixturewas stirred for 5 minutes at −78 C and added via cannula to thearyllithium species. The reaction mixture was stirred at −78° C. for 10minutes. The reaction was quenched with saturated ammonium chloridesolution and warmed to RT. The reaction mixture was diluted with waterand EtOAc. The organic layer was separated and the aqueous layer waswashed with additional EtOAc. The combined organic layers were washedwith brine and dried over magnesium sulfate. The filtrate wasconcentrated under reduced pressure and the crude material was purifiedvia silica gel chromatography, eluting with 5-45% EtOAc:Hexanes toafford the title compound (10.19 g, 33.2 mmol, 63.8% yield). MSm/z=305.9 [M+H]⁺. Calculated for C₁₁H₁₀BrClFNO: 306.6

Step 2: [(1R,S),(2R,S)]-2-4S,R)-1-amino-1-(5-bromo-2-chlorophenyl)-2-fluoroethyl)cyclopropanol(6b rac)

To a solution of[(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-chlorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(6a rac, 14.06 g, 45.9 mmol) in acetic acid (180 mL, 3119 mmol) wasadded zinc dust (17.99 g, 275 mmol) in portions at RT. TFA (81 mL, 1055mmol) was added and the reaction was stirred at RT for one hour. Thereaction was filtered through celite and the filter cake was washed withadditional acetic acid. The filtrate was poured over ice and thesolution was basified to pH=14 by the addition of 5 M NaOH solution. Thebasic aqueous solution was back extracted with EtOAc (2×). The combinedorganic layers were washed with brine, dried over magnesium sulfate andconcentrated under reduced pressure to afford the title compound (13.88g, 45.0 mmol, 98% yield). MS m/z=307.9 [M+H]⁺. Calculated forC₁₁H₁₂BrClFNO: 308.6

Step 3-4: N-(((1R,S), (5S,R),(6R,S))-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(9d rac)

The title compound was prepared following procedures similar to thosedescribed in steps 7 and 8 for the synthesis of 1i rac, but using[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(5-bromo-2-chlorophenyl)-2-fluoroethyl)cyclopropanol(6b rac) MS m/z=374.0 [M+H]⁺. Calculated for C₁₉H₁₇ClFN₃O₂: 373.8

Step 5:N-((1S,5R,6S)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(6x-A) &N-((1R,5S,6R)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(9d-B)

N-(((1R,S), (5S,R),(6R,S))-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(9d rac, 2.1 g) was subjected to chromatography using supercritical CO₂(additives 35% (MeOH with 20 mM NH₃) on a Chiralpak OD column (21×250mm, 10 μm) eluting at a flow rate 70 ml/min (130 bar pressure, 40° C.column temperature). The first peak (retention time=1.45 min) providedN-((1S,5R,6S)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(9d-A, 876 mg, 2.34 mmol, 41.7% yield; 99% de; 99% ee) as a light yellowpowder. The second peak (retention time=2.14 min) providedN-((1R,5S,6R)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(9d-B, 932 mg, 2.49 mmol, 44.4 yield; 99% de; 99% ee) as a light yellowpowder. MS m/z=374.0 [M+H]⁺. Calculated for C₁₉H₁₇ClFN₃O₂: 373.8 forboth enantiomers.

Step 6: [(1R,S),(5S,R),(6R,S)]-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(9e rac)

The title compound was prepared following a procedure similar to thatdescribed in steps 4 for the synthesis of 4d rac, but using N-(((1R,S),(5S,R),(6R,S))-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(9d rac) MS m/z=269.9 [M+H]⁺. Calculated for C₁₂H₁₃ClFN₃O: 269.7

Step 7:(1S,5R,6S)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(9e-A) and(1R,5S,6R)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(9e-B)

[(1R,S),(5S,R),(6R,S)]-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(9e rac, 130 mg) was subjected to chromatography using supercritical CO₂(additives 35% (MeOH with 20 mM NH₃) on a Chiralpak ODH column (20×250mm, 10 μm) eluting at a flow rate 70 ml/min (172 bar pressure, 40° C.column temperature). The first peak (retention time=1.71 min) provided(1S,5R,6S)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(9e-A, 33 mg, 0.12 mmol, 25% yield; 99% de; 99% ee) as a light yellowpowder. The second peak (retention time=2.42 min) provided(1R,5S,6R)-5-(5-amino-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(9e-B, 33 mg, 0.12 mmol, 25% yield; 99% de; 99% ee) as a light yellowpowder.

MS m/z=270.0 [M+H]⁺ (for both enantiomers)

Peak 1: ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.68-0.85 (m, 1H) 0.92 (td,J=6.58, 2.63 Hz, 1H) 1.70 (dt, J=9.90, 6.96 Hz, 1H) 3.80-3.94 (m, 2H)4.48-4.65 (m, 1H) 4.68-4.83 (m, 1H) 5.16 (s, 2H) 5.55 (s, 13H) 6.45 (dd,J=8.40, 2.85 Hz, 7H) 6.87 (d, J=2.78 Hz, 1H) 7.01 (d, J=8.48 Hz, 1H)

Peak 2: ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.79 (dt, J=9.68, 6.27 Hz, 1H)0.92 (td, J=6.58, 2.78 Hz, 1H) 1.70 (dt, J=9.79, 7.09 Hz, 1H) 3.73-3.96(m, 1H) 4.39-4.65 (m, 1H) 4.68-4.84 (m, 1H) 5.16 (s, 2H) 5.54 (s, 2H)6.45 (dd, J=8.48, 2.78 Hz, 1H) 6.87 (d, J=2.92 Hz, 1H) 7.01 (d, J=8.33Hz, 7H)

Example 10

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(2,6-difluorophenyl)-4-fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(10a rac)

A solution of 1-bromo-2,6-difluorobenzene (2.51 ml, 16.94 mmol) in Et₂O(25 mL) was cooled to −78° C. and a solution of n-butyllithium (2.5M inhexanes, 6.78 ml, 16.94 mmol) was added dropwise. The resulting mixturewas stirred at −78° C. for 20 min. A second flask was charged with asolution of 4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6c rac,1.3 g, 11.29 mmol) in toluene (5 mL) The reaction mixture was cooled to−78° C. and boron trifluoride diethyl etherate (1.464 ml, 11.86 mmol)was added. The reaction mixture was stirred for 5 min at −78 C andtransferred via cannula to the aryllthium solution. The resultingreaction mixture was stirred at −78° C. for 30 min. The reaction wasquenched with saturated NH₄Cl solution. The reaction mixture was allowedto warm to room temperature and diluted with EtOAc and water. Theorganic layer was separated and the aqueous phase was extracted withEtOAc (2×). The combined organic layers were dried over Na₂SO₄ and thefiltrate was concentrated under reduced pressure. The residue waspurified by silica gel chromatography, eluting with 0-15% EtOAc/hexanes,to afford the title compound (2.02 g, 8.81 mmol, 78% yield). MS m/z=230[M+H]⁺. Calculated for C₁₁H₁₀F₃NO:229.07

Step 2-4: [(1R,S), (5S,R),(6R,S)]-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10d rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2 to 4 for the synthesis of 4d rac, but using[(1R,S), (4S,R),(5R,S)]-4-(2,6-difluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(10a rac)

MS m/z=256.9 [M+H]⁺. Calculated for C₁₂H₁₁F₃N₂O: 256.08

Step 5: [(1R,S), (5S,R),(6R,S)]-5-(2,6-difluoro-3-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10e rac)

[(1R,S), (5S,R),(6R,S)]-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10d rac, 0.107 g, 0.418 mmol) was dissolved in conc. H₂SO₄ (5 mL) andthe flask containing the solution was placed in an ice-bath. Potassiumnitrate (0.063 g, 0.626 mmol) was added in one portion and the reactionmixture was stirred for 5 min. The ice-bath was removed and the reactionwas quenched after 10 min by the addition of ice. DCM, water andpotassium phosphate tribasic (7 g, 33.0 mmol) were added and thereaction mixture was stirred for 5 min, followed by slow addition ofaqueous saturated NaHCO₃ solution. The reaction mixture was neutralizedwith 5 N NaOH solution and extracted with DCM. The combined organiclayers were dried over Na₂SO₄. The filtrate was concentrated underreduced pressure to afford the title compound (0.116 g, 0.385 mmol, 92%yield). MS m/z=301.9 [M+H]⁺. Calculated for C₁₂H₁₀F₃N₃O₃:301.07

Step 6: [(1R,S), (5S,R),(6R,S)]-5-(3-amino-2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10f rac)

A solution of [(1R,S), (5S,R),(6R,S)]-5-(2,6-difluoro-3-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10e rac, 0.111 g, 0.368 mmol) in EtOH (5 mL) was purged with Nitrogenfollowed by the addition of palladium (10% wt. on activated carbon,0.196 g, 0.184 mmol) and acetic acid (0.128 ml, 2.211 mmol). Thereaction mixture was purged with Hydrogen for 35 min. The reactionmixture was filtered through celite and the filtrate was concentratedunder reduced pressure. The residue was dissolved in DCM and washed with10% aqueous Na₂CO₃ solution. The organic layer was dried over Na₂SO₄ andthe filtrate was concentrated to afford the title compound (0.082 g,0.302 mmol, 82% yield).

Step 7:(1R,5S,6R)-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 10d-A) and(1S,5R,6S)-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 10d-B)

[(1R,S), (5S,R),(6R,S)]-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10d rac) was subjected to chromatography using supercriticalCO₂(additive 35% MeOH with 20 mM NH₃) on a IC column (21×250 mm, 5 μm)eluting at a flow rate 50 ml/min (100 bar pressure, 40° C. columntemperature). The first peak (retention time=1.13 min) provided(1R,5S,6R)-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 10d-A; 571 mg, mmol, 48% yield; 99% de; 99% ee) as alight-yellow powder, MS m/z=256.9 [M+H]₊ and(1S,5R,6S)-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 10d-B; 560 mg, mmol, 47% yield; 99% de; 99% ee) as alight-yellow powder. MS m/z=256.9 [M+H]

Step 8-9:(1R,5S,6R)-5-(3-amino-2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10f-A)

The title compound was prepared following procedures similar to thosedescribed in steps 5 and 6 for the synthesis of 10f rac, but using(1R,5S,6R)-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 10d-A). MS m/z=272.0 [M+H]⁺.

Step 8-9:(1S,5R,6S)-5-(3-amino-2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(10f-B)

The title compound was prepared following procedures similar to thosedescribed in steps 5 and 6 for the synthesis of 10f rac, but using(1S,5R,6S)-5-(2,6-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 10d-B). MS m/z=271.9 [M+H]⁺.

Example 11

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(2,3-difluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(11a rac)

A solution of n-butyllithium (2.5 M in hexanes, 35.4 mL, 89 mmol) wasadded to a solution of 1-bromo-2,3-difluorobenzene (16.10 g, 83 mmol) indiethyl ether (60 mL) under nitrogen atmosphere at −78 C. The resultingreaction mixture was stirred for 15 minutes. An additional flask wascharged with 4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6crac, 6 g, 52.1 mmol) and toluene (30 mL). The reaction mixture wasplaced under nitrogen atmosphere and cooled to −78° C. Boron fluoridediethyl etherate (7.08 mL, 57.3 mmol) was added and the solution wasstirred for 5 minutes. This solution was transferred via cannula to thearyl lithium solution. The resulting reaction mixture was stirred for 25minutes. The reaction was quenched by addition of saturated NH₄Clsolution and subsequently partitioned between water and ethyl acetate.The organic phase was dried over sodium sulfate and the filtrateevaporated under reduced pressure. The residue was purified by flashchromatography (hexane to DCM=4:1 to 3:1 to 1:1) to give the titlecompound (6.5 g, 28.4 mmol, 54.4% yield). MS m/z=230 [M+H]⁺.

Step 2:[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(2,3-difluorophenyl)-2-fluoroethyl)cyclopropanol(11b rac)

The title compound was prepared following a procedure similar to thatdescribed in step 2 for the synthesis of 4b rac, but using [(1R,S),(4S,R),(5R,S)]-4-(2,3-difluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(11a rac). MS m/z=232 [M+H]⁺.

Step 3: N-(((1R,S),(5S,R),(6R,S))-5-(2,3-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(11c rac)

To a solution of[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(2,3-difluorophenyl)-2-fluoroethyl)cyclopropanol(11b rac, 6.46 g, 27.9 mmol) in dry tetrahydrofuran (30 mL) undernitrogen was added benzoyl isothiocyanate (3.76 mL, 27.9 mmol) dropwise.After 10 minutes, N,N-diisopropylethylamine (1 mL) was added and thereaction mixture was stirred for an additional 10 minutes. AdditionalN,N-diisopropylethylamine (9.72 mL, 55.9 mmol) was added followed by1-(3-dimethylaminopropyl)-3-ethylcarbodiimide HCl (5.89 g, 30.7 mmol.The reaction mixture was stirred at room temperature overnight. Thereaction mixture was diluted with DCM (100 mL) and water (100 mL), thephases were separated and the organic phase was dried over magnesiumsulfate. The filtrate was concentrated under reduced pressure. Theresidue was purified by flash chromatography to give the title compound(8.2 g, 22.76 mmol, 81% yield) as a sticky, light yellow tar. MS m/z=361[M+H]

Step 4:[(1R,S),(5S,R),(6R,S)]-5-(2,3-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(11d rac)

The title compound was prepared following a procedure similar to thatdescribed in step 4 for the synthesis of 4d rac, but using N-((1R,S),(5S,R),(6R,S))-5-(2,3-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(11e rac) MS m/z=257 [M+H]⁺.

Step 5: [(1R,S),(5S,R),(6R,S)]-5-(2,3-difluoro-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(11e rac)

[(1R,S),(5S,R),(6R,S)]-5-(2,3-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(11d rac, 5.4 g, 21.08 mmol) was dissolved in concentrated sulfuric acid(25 mL) and the solution was cooled to 0° C. Sodium nitrate (2.69 g,31.6 mmol) was added in one portion and the reaction mixture was stirredfor 5 minutes at 0° C. The cold bath was removed and the reactionmixture was allowed warm to room temperature. After 10 minutes, ice(˜100 mL) was added, and the reaction mixture was poured into a mixtureof dichloromethane (200 mL), water (200 mL), ice (˜100 mL), and tribasicpotassium phosphate (65 g). The resulting mixture was stirred for 5minutes, followed by the addition of saturated sodium bicarbonatesolution (50 mL). The organic phase was separated and the aqueous phasewas extracted with ethyl acetate (2×150 mL). The combined organicextracts were dried over magnesium sulfate and the filtrate wasconcentrated under reduced pressure and taken into the next step withoutfurther purification.

Step 6:[(1R,S),(5S,R),(6R,S)]-5-(5-amino-2,3-difluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(11f rac)

The residue obtained in step 5 was dissolved in acetic acid (40 mL) andtreated with zinc dust (13.78 g, 211 mmol). The reaction mixture wasstirred for 30 minutes and the slurry was filtered. The filter cake waswashed with ethyl acetate (200 mL). The combined filtrate wasconcentrated under reduced pressure and the residue was purified byflash chromatography (100% DCM to DCM/EtOAc=4:1 to DCM/EtOAc 2:1 toDCM/EtOAc 1:1 to 100% EA) to give the title compound (5.2 g, 19.17 mmol,91% yield). MS m/z=272.1 [M+H]⁺.

Example 12

Step 1: [(1R,S),(5S,R),(6R,S)]-5-(3-fluoro-2-methoxy-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(12a rae)

To a solution of [(1R,S),(5S,R),(6R,S)]-5-(2,3-difluoro-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(11e rac, 500 mg, 1.660 mmol) in MeOH (10 mL) was added potassiumcarbonate (459 mg, 3.32 mmol). The reaction mixture was heated to 60° C.for 1 h. The reaction mixture was cooled to rt and the solvent wasevaporated under reduced pressure. The residue was purified by flashchromatography (100% DCM to DCM/EtOAc=4:1 to DCM/EtOAc 1:1) to give thetitle compound (420 mg, 1.341 mmol, 81% yield). MS m/z=313.9 [M+1]⁺.Calculated for C₁₃H₁₃F₂N₃O₄: 313.3.

Step 2: [(1R,S), (5S,R),(6R,S)]-5-5-amino-3-fluoro-2-methoxyphenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(12b rac)

A suspension of [(1R,S),(5S,R),(6R,S)]-5-(3-fluoro-2-methoxy-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(12a rac, 160 mg, 0.511 mmol) and palladium (10% on activated carbon,109 mg, 0.102 mmol) in EtOH (20 mL) was purged with Nitrogen, followedby Hydrogen. The flask was fitted with a balloon filled with Hydrogenand the reaction mixture was stirred overnight. The reaction mixture wasfiltered through a pad of celite and the filter cake was rinsed withEtOAc. The filtrate was absorbed onto silica gel and purified by flashchromatography (100% EtOAc to EtOAc/MeOH=10:1) to give the titlecompound (140 mg, 0.494 mmol, 97% yield). MS m/z=284.0 [M+1]⁺.Calculated for C₁₃H₁₅F₂N₃O₂: 283.2.

¹H NMR (400 MHz, CHLOROFORM-d) δ=6.54-6.46 (m, 1H), 6.41 (dd, J=2.7,12.9 Hz, 1H), 4.74 (s, 1H), 4.63 (s, 1H), 3.88 (d, J=1.8 Hz, 3H),3.77-3.62 (m, 1H), 1.76 (td, J=7.2, 9.7 Hz, 1H), 1.13 (dt, J=2.8, 6.8Hz, 1H), 0.90-0.79 (m, 1H).

Example 13

Step 1: [(1R,S), (5S,R),(6R,S)]-5-3-fluoro-2-(methylthio)-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(13a rac)

[(1R,S),(5S,R),(6R,S)]-5-(2,3-difluoro-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(11e rac, 0.100 g, 0.332 mmol) was dissolved in MeOH (0.75 mL) andS-methyl benzothioate (0.056 g, 0.365 mmol) was added to the solution,followed by a solution of sodium methoxide (0.5M solution in methanol,0.730 ml, 0.365 mmol). The reaction mixture was stirred at roomtemperature for 30 min and subsequently partitioned between EtOAc andwater. The aqueous layer was separated and extracted with EtOAc. Thecombined organic layers were washed with brine, dried over sodiumsulfate, and the filtrate was concentrated under reduced pressure. Thecrude material was purified by column chromatography, eluting with agradient of 10-100% EtOAc/Hexanes to give the title compound (81 mg, 74%yield).

Step 2: [(1R,S), (5S,R),(6R,S)]-5-(5-amino-3-fluoro-2-(methylthio)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(13b rac)

A flask was charged with [(1R,S), (5S,R),(6R,S)]-5-(3-fluoro-2-(methylthio)-5-nitrophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(13a rac, 0.073 g, 0.222 mmol), palladium (10% wt. on activated carbon,1.963 μl, 0.022 mmol), EtOAc (600 μL) and MeOH (600 μL). The reactionmixture was purged with Nitrogen, followed by Hydrogen. The flask wasfitted with a balloon filled with hydrogen and the reaction mixture wasstirred at rt overnight. The reaction mixture was filtered through a padof celite and the filter cake was washed with EtOAc. The filtrate wasconcentrated under reduced pressure to obtain the title compound. MSm/z=299.9 [M+H]⁺. Calculated for C₁₃H₁₅F₂N₃OS: 299.3

Example 14

Step 1:[1(S,R,4(R,S),5(S,R)]-4-(2-chloro-3-fluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(14a rac)

To a cooled (−78° C., internal) solution of1-bromo-2-chloro-3-fluorobenzene (18.02 g, 86 mmol) in Et₂O (90 mL) wasadded a solution of n-butyllithium (2.5M in toluene, 34.0 ml, 85 mmol)over a period of 20 min. After completed addition, the reaction mixturewas stirred for additional 30 min at that temperature. In a separateflask, a cooled (−78° C.) solution of 6c (4.0 g, 34.8 mmol) in toluene(24 ml) was treated with boron trifluoride diethyl etherate (4.3 ml,34.8 mmol). The reaction mixture was stirred at that temperature for 20min. This solution was added via cannula to the organilithium mixture.After 30 min, the reaction was quenched with 5% aq KHSO₄ solution (75mL) and the reaction mixture was allowed to warm to rt. The layers wereseparated and the aqueous layer was extracted with EtOAc (3×). Thecombined organic layers were washed with brine and dried over Na₂SO₄.The filtrate was absorbed onto silica gel and purified by flashchromatography, eluting with a gradient 0:1→1:4 EtOAc:hexane, to givethe title compound as a light-yellow crystalline solid (4.87 g, 57%). MSm/z=245.9, 248.0 [M+H]⁺. Calculated for C₁₁H₁₀ClF₂NO: 245.6

Steps 2-6:[1(S,R),5(R,S),6(S,R)]-5-(5-amino-2-chloro-3-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(14f rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2-6 for the synthesis of 11f rac, but using[1(S,R,4(R,S),5(S,R)]-4-(2-chloro-3-fluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(14a rac) MS m/z=287.9, 290.0 [M+H]⁺. Calculated for C₁₂H₁₂ClF₂N₃O:287.7

Example 15

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(3-chloro-2-fluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(15a rac)

A solution of n-butyllithium (2.5M in hexanes, 5.21 ml, 13.03 mmol) wasadded dropwise to a cooled (−78 C) solution of1-bromo-3-chloro-2-fluorobenzene (2.73 g, 13.03 mmol) in Et₂O (40 mL).The resulting reaction mixture was stirred at −78° C. for 20 min. In aseparate flask, a solution of4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6c rac, 1.0 g, 8.69mmol) in toluene (10 mL) was cooled to −78° C. Boron trifluoride diethyletherate (1.126 ml, 9.12 mmol) was added and the reaction mixture wasstirred for 5 min. This solution was subsequently transferred viacannula to the aryl lithium solution. The resulting reaction mixture wasstirred at −78° C. for 30 min. The reaction was quenched with aqueoussaturated NH₄Cl solution and allowed to warm to room temperature. EtOAcand water were added. The aqueous phase was separated and extracted withEtOAc. The combined organic layers were dried over Na₂SO₄ and thefiltrate was concentrated under reduced pressure. The residue waspurified by silica gel chromatography (0-10% EtOAc/hexanes) to affordthe title compound (1.81 g, 7.37 mmol, 85% yield). MS m/z=245.9 [M+H]⁺.Calculated for C₁₁H₁₀ClF₂NO:245.04.

Steps 2-4: [(1R,S), (5S,R),(6R,S)]-5-3-chloro-2-fluorophenyl)-5-fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15d rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2-4 for the synthesis of 11d rac, but using [(1R,S),(4S,R),(5R,S)]-4-(3-chloro-2-fluorophenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(15a rac). MS m/z=272.9 [M+H]⁺. Calculated for C₁₂H₁₁ClF₂N₂O: 272.05.

Step 5-6: [(1R,S), (5S,R),(6R,S)]-5-(5-amino-3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15f rac)

The title compound was prepared following procedures similar to thosedescribed in steps 5-6 for the synthesis of 11f rac, but using [(1R,S),(5S,R),(6R,S)]-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15d rac). MS m/z=287.9 [M+H]⁺. Calculated for C₁₂H₁₂ClF₂N₃O: 287.06.

Step 7:(1S,5R,6S)-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15d-A) and(1R,5S,6R)-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15d-B)

[(1R,S), (5S,R),(6R,S)]-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15d rac) was subjected to chromatography using supercritical CO₂(additives 30% MeOH with 20 mM NH₃) on a IC column (30×250 mm, 5 μm)eluting at a flow rate 120 ml/min (158 bar pressure, 40° C. columntemperature). The first peak (retention time=1.28 min) provided(1S,5R,6S)-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 15d-A, 863 mg, 3.17 mmol, 39% yield; 99% de; 99% ee) as alight-yellow powder. MS m/z=272.9 [M+H] The second peak (retentiontime=1.93 min) provided(1R,5S,6R)-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 15d-B; 878 mg, 3.22 mmol, 40% yield; 99% de; 99% ee) as alight-yellow powder. MS m/z=272.9 [M+H]⁺.

Steps 8-9:(1R,5S,6R)-5-(5-amino-3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(15f-B)

The title compound was prepared following procedures similar to thosedescribed in steps 5-6 for the synthesis of 15f rac, but using(1R,5S,6R)-5-(3-chloro-2-fluorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 15d-B). MS m/z=287.9 [M+H]⁺. Calculated for C₁₂H₁₂ClF₂N₃O:287.06.

Example 16

Step 1: 5-(Chloromethyl)-3-(difluoromethyl)-4,5-dihydroisoxazole (16arac)

A solution of dimethyl sulfoxide (35.6 ml, 501 mmol) in DCM (50 mL) wasadded dropwise to a solution of oxalyl chloride (20.47 ml, 231 mmol) inDCM (400 mL) at −78° C. This solution was stirred for 10 min before asolution of (5-(chloromethyl)-4,5-dihydroisoxazol-3-yl)methanol (15.0 g,100 mmol, synthesized according to Tetrahedron 1986, 42, 5267) in DCM(50 mL) was added dropwise. This mixture was stirred for 15 minutes at−78° C. before triethylamine (13.98 ml, 100 mmol) was added dropwise.The dry ice bath was removed and replaced with an ice bath. After 30min, water and Et₂O were added and the layers were separated. Theorganic layer was washed with water, dried over MgSO₄ and the filtratewas concentrated in vacuo. The residue was dissolved in DCM (300 mL),the solution was cooled to −78° C. solution and (diethylamino)sulfurtrifluoride (39.7 ml, 301 mmol) was added. The dry ice bath was replacedwith an ice bath and the reaction mixture was stirred for 30 min. Thereaction was quenched by addition of aqueous saturated NaHCO₃ solution,and the resulting biphasic mixture was separated. The aqueous layer wasextracted with DCM. The combined organic extracts were dried over MgSO₄and the filtrate was concentrated in vacuo to give an oil. The oil waspurified by silica gel chromatography (0 to 60% Et₂O/hexane gradient) togive the title compound (11.0 g, 65% yield for the two steps).

Step 2: 4-(Difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (16b rac)

A solution of potassium tert-butoxide (1.0 M in THF, 66.3 mL, 66.3 mmol)was added dropwise to a solution of5-(chloromethyl)-3-(difluoromethyl)-4,5-dihydroisoxazole (16a rac, 9.0g, 53.1 mmol) in THF (70 mL) at 0° C. The reaction mixture was stirredfor 30 min, then aqueous saturated NH₄Cl solution was added slowly. Themixture was extracted with Et₂O (2×), and the combined organic extractswere dried over MgSO₄. The filtrate was concentrated under reducedpressure. The residue was purified by silica gel chromatography (0-60%Et₂O/pentane gradient) to give the title compound as an oil (5.29 g, 75%yield)

¹H NMR (300 MHz, CHLOROFORM-d) d ppm 6.43-6.45 (s, 1H) 5.08 (td, J=5.41,2.34 Hz, 1H) 2.75-2.83 (m, 1H) 1.04-1.14 (m, 1H) 0.38 (dd, J=1.90, 1.61Hz, 1H)

Step 3: [(1(R,S), 4(S,R),5(R,S)]-4-(5-bromo-2-fluorophenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(16c rac)

A solution of n-butyllithium (2.5 M in hexanes, 49.6 mL, 124 mmol) wasadded slowly over 20 min to a stirred solution of4-bromo-1-fluoro-2-iodobenzene (37.7 g, 125 mmol) in diethyl ether (240mL) at −78° C. under a nitrogen atmosphere. The reaction mixture wasstirred at −78° C. for 15 min. A separate flask was charged with asolution of 4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (8.25g, 62.0 mmol) in toluene (280 mL) and cooled to −78° C. Borontrifluoride diethyl etherate (7.80 mL, 63.2 mmol) was added and afterstirring the reaction mixture for 5 min at −78° C., it was transferredvia cannula to the aryl lithium solution. The reaction mixture wasstirred at −78° C. for 1 h and subsequently quenched with saturatedaqueous NH₄Cl solution. The mixture was warmed to RT and diluted withEtOAc and water. The organic layer was separated. The aqueous layer wasextracted once more with EtOAc. The combined organic layers were washedwith brine, dried over MgSO₄. The filtrate was concentrated in vacuo andthe resulting crude product was purified via silica gel flash columnchromatography eluting with 0 to 20% EtOAc in heptane to give the titlecompound as a light orange solid (15.14 g, 79% yield).

Steps 4-6: [(1R,S), (5S,R),(6R,S)]-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2-4 for the synthesis of 4d rac, but using [(1(R,S),4(S,R),5(R,S)]-4-(5-bromo-2-fluorophenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(16c rac). LC/MS (ESI⁺) m/z=334.9 (M+H).

Step 7:(1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-A) and(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-B)

[1(S,R),5(R,S),6(S,R)]-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-rac) (9.39 g, 28 mmol) was subjected to chromatography usingsupercritical CO₂ (additives 10% MeOH with 20 mM NH₃) on a Chiralpak ADH(30×250 mm, 5 μm) eluting at a flow rate 100 mL/min (120 bar pressure,ambient column temperature). The first peak (retention time=4.94 min)provided (Example 16f-A; 3.54 g, 10.6 mmol, 38% yield; >99% de; >99% ee)as a white solid. LC/MS (ESI⁺) m/z=334.9 (M+H). Calculated forC₁₂H₁₀BrF₃N₂O 334.0. ¹H NMR (400 MHz, CDCl₃) δ 0.95 (dt, J=9.34, 6.97Hz, 1H), 1.28-1.42 (m, 1H), 1.78 (dt, J=9.49, 7.09 Hz, 1H), 3.89-3.94(m, 1H), 4.42 (br s, 2H), 6.13 (t, J=56.70 Hz, 1H), 6.97 (dd, J=11.54,8.61 Hz, 1H), 7.42 (ddd, J=8.61, 4.30, 2.54 Hz, 1H), 7.65 (dd, J=6.85,2.54 Hz, 1H). The second peak (retention time=6.26 min) provided(Example 16f-B; 3.52 g, 10.5 mmol, 38% yield; >99% de; >98.4% ee) as awhite solid. LC/MS m/z=334.9 [M+H]⁺. Calculated for C₁₂H₁₀BrF₃N₂O 334.0.¹H NMR (400 MHz, CDCl₃) δ 0.95 (dt, J=9.44, 6.92 Hz, 1H), 1.37 (t,J=7.04 Hz, 1H), 1.78 (dt, J=9.54, 7.16 Hz, 1H), 3.89-3.94 (m, 1H), 4.45(br s, 2H), 6.15 (t, J=56.10 Hz, 1H), 6.97 (dd, J=11.54, 8.80 Hz, 1H),7.42 (ddd, J=8.61, 4.21, 2.64 Hz, 1H), 7.65 (dd, J=7.04, 2.54 Hz, 1H).

Step 8:(1S,5R,6S)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16g-B)

The title compound was prepared following a procedure similar to thatdescribed in step 8 for the synthesis of 6h-B, but using(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-B). MS m/z=272.0 [M+H]+.

Step 9:[(1R,S),(5S,R),(6R,S)]-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16g rac)

The title compound was prepared following a procedure similar to thatdescribed in step 9 for the synthesis of 6h rac, but using [(1R,S),(5S,R),(6R,S)]-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f rac). MS m/z=272.0 [M+H]+.

Step 10: tert-butyl((1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(16h-B)

To a solution of(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-B, 1.22 g, 3.64 mmol) in dioxane (10 mL) at room temperature wasadded saturated aqueous NaHCO₃ (15 mL) and di-tert-butyl dicarbonate(0.975 g, 4.47 mmol). The reaction mixture was heated to 40° C. for 21h. Additional di-tert-butyl dicarbonate (1.02 g, 4.68 mmol) was added.Stirring at 40° C. was continued for 1 d. The reaction mixture wascooled to RT and diluted with EtOAc. The organic phase was washed withbrine and dried over MgSO₄. The filtrate was concentrated under reducedpressure and the residue was purified by flash column chromatography onsilica gel (40 g, 5% to 50% EtOAc in hexanes) to give the title compound(1.47 g, 3.38 mmol, 93% yield) as a white solid. MS m/z=434.9 [M+H]+.Calculated for C₁₇H₁₈BrF₃N₂O₃ 434.0.

Step 11: tert-butyl((1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(16i-B)

To a mixture of tert-butyl((1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(16h-B, 1.47 g, 3.38 mmol), copper(I) iodide (0.139 g, 0.730 mmol),(+)-sodium 1-ascorbate (0.131 g, 0.661 mmol), and sodium azide (0.688 g,10.6 mmol) were added EtOH (4.6 mL) and water (2.3 mL). The reactionmixture was purged with Nitrogen for 10 min, followed by the addition of(1R,2R)-(−)-N,N″-dimethylcyclohexane-1,2-diamine (0.110 mL, 0.698 mmol).The reaction mixture was heated to 70° C. for 1.5 h and cooled to RT.The reaction mixture was poured into 10:1 saturated NH₄Cl/ammoniumhydroxide, and diluted with EtOAc. The aqueous phase was extracted withEtOAc (2×) and the combined organic extracts were washed with brine anddried over MgSO₄. The filtrate was concentrated under reduced pressureto give a solid, which was dissolved in THF (12 mL) and water (4 mL). Asolution of trimethyl phosphine (1.0 M in THF, 3.40 mL, 3.40 mmol) wasadded and the reaction mixture was stirred at RT for 15 min. Thereaction mixture was diluted with EtOAc and water, the aqueous phase wasseparated and extracted with EtOAc. The combined organic extracts werewashed with brine and dried over MgSO₄. The filtrate was concentratedunder reduced pressure and the residue was purified by flash columnchromatography on silica gel (20% to 70% EtOAc in heptane) to give thetitle compound (1.03 g, 2.77 mmol, 82% yield) as a white solid. MSm/z=372.0 [M+H]+. Calculated for C₁₇H₂₀F₃N₃O₃ 371.1.

Example 17

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(6-bromo-3-fluoropyridin-2-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(17a rac)

A flame dried RBF was charged with 2-bromo-5-fluoropyridine (10.23 g,58.2 mmol) and diethyl ether (240 mL). The solution was cooled to −78°C. before adding a solution of n-butyllithium (2.5M in hexane, 23.26 ml,58.2 mmol) dropwise. The reaction mixture was stirred at −78° C. for 30min. A second flask was charged with a solution of4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (16b rac, 3.87 g,29.1 mmol) in DCM (100 mL) and cooled to −78° C. solution. Boronfluoride diethyl etherate (3.59 ml, 29.1 mmol) was added and after 15min, this reaction mixture was transfers via cannula to the aryl lithiumsolution. Upon complete addition the reaction mixture was stirred at−78° C. for 30 minutes and then gradually warmed to RT for 2 hours. Thereaction was diluted with water and DCM. The organic layer wasseparated, washed with brine and dried over magnesium sulfate. Thefiltrate was concentrated under reduced pressure and the crude materialwas purified via silica gel flash chromatography using a gradient of5-40% EtOAc in hexanes to afford the title compound (3.74 g, 12.10 mmol,41.6% yield) as a brown solid. MS m/z=308.9 M. Calculated forC₁₀H₈BrF₃N₂O: 309.1

Steps 2-4: [(1R,S), (5S,R),(6R,S)]-5-(6-bromo-3-fluoropyridin-2-yl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(17d rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2-4 for the synthesis of 4d rac, but using [(1R,S),(4S,R),(5R,S)]-4-(6-bromo-3-fluoropyridin-2-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(17a rac) MS m/z=335.9 M⁺. Calculated for C₁₁H₉BrF₃N₃O: 336.1

Step 5:(1R,5S,6R)-5-(6-bromo-3-fluoropyridin-2-yl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(17d-A) and(1S,5R,6S)-5-(6-bromo-3-fluoropyridin-2-yl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(17d-B)

[(1R,S), (5S,R),(6R,S)]-5-(6-bromo-3-fluoropyridin-2-yl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(17d rac) was subjected to chromatography using supercritical CO₂(additives 12% MeOH with 20 mM NH₃) on an ODH column (20×250 mm, 5 μm)eluting at a flow rate 75 ml/min (100 bar pressure, 40° C. columntemperature). The first peak (retention time=1.02 min) provided (Example17d-A; 510 mg, 1.518 mmol, 43% yield; 99% de; 99% ee) as a white powder.The second peak (retention time=1.29 min) provided (Example 17d-B; 490mg, 1.458 mmol, 41% yield; 99% de; 99% ee) as a white powder. MSm/z=335.9 M. Calculated for C₁₁H₉BrF₃N₃O: 336.1 for both enantiomers.

Example 18

Step 1: [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoropyridin-3-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(18a rac)

A solution of n-butyllithium (9.39 mL, 15.03 mmol, 1.60 M in hexanes)was added to a solution of diisopropylamine (2.106 mL, 15.03 mmol) inTHF (30 mL) at 0° C. under a nitrogen atmosphere. The reaction mixturewas stirred at 0° C. for 10 min and then cooled to −78° C.5-Bromo-2-fluoropyridine (1.729 mL, 15.03 mmol) was added dropwise, thereaction mixture was stirred at −78° C. for 30 min, followed by theaddition of N,N,N′,N′-tetramethylethanediamine (2.249 mL, 15.03 mmol). Aseparate flask was charged with a solution of4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (16b rac, 1.00 g,7.51 mmol) in toluene (20 mL) and cooled to −78° C. solution. Boronfluoride diethyl etherate (0.927 mL, 7.51 mmol) and after 3 min, thisreaction mixture was transferred via cannula to the aryl lithiumsolution. Upon complete addition the reaction mixture was stirred at−78° C. for 1 h, then allowed to warm to 0° C. and quenched withsaturated aqueous ammonium chloride solution. The biphasic mixture wasextracted with EtOAc. The organic layer was separated, washed with brineand dried over magnesium sulfate. The filtrate was concentrated in vacuoand the resulting crude residue was purified via silica gel flash columnchromatography (eluent: 0% to 30% EtOAc in hexanes) to yield a 2:1mixture of the regioisomers [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoropyridin-3-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(18a rac) and [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoropyridin-4-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexaneas a yellow solid (1.164 g). The mixture was taken onto the next step.MS m/z=308.9 [M+H]+. (for both regioisomers) Calculated forC₁₀H₈BrF₃N₂O: 307.977.

Steps 2:[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(5-bromo-2-fluoropyridin-3-yl)-2,2-difluoroethyl)cyclopropanol(18b rac)

To a stirred solution of a 2:1 mixture of [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoropyridin-3-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(18a rac) and [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoropyridin-4-yl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(0.879 g, 2.84 mmol) in trifluoroacetic acid (10.6 mL, 142 mmol) wasadded zinc dust (1.86 g, 28.4 mmol). The reaction mixture was stirred atroom temperature for 1.5 h before being diluted with DCM and filtered.The filtrate was diluted with saturated aqueous sodium bicarbonate andbrought to pH 9 with 1 M aqueous NaOH. The organic layer was separated,and the aqueous layer was extracted once more with DCM. The combinedorganic layers were dried over magnesium sulfate and the filtrate wasconcentrated under reduced pressure. The resulting crude residue waspurified via silica gel flash column chromatography (eluent: 0 to 50%EtOAc in hexanes) to give[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(5-bromo-2-fluoropyridin-3-yl)-2,2-difluoroethyl)cyclopropanol(0.322 g, 1.04 mmol, 36.4% yield) as a light yellow oil that partiallysolidified upon standing. MS m/z=312.8 [M+H]+.

Steps 3-6:[1(R,S),5(S,R),6(R,S)]-5-(5-amino-2-fluoropyridin-3-yl)-5-difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(18f rac)

The title compound was prepared following procedures similar to thosedescribed in steps 3-5 for the synthesis of 5e rac, and step 8 for thesynthesis of 8g-B but using[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(5-bromo-2-fluoropyridin-3-yl)-2,2-difluoroethyl)cyclopropanol(18b rac). MS m/z=273.0 [M+H]⁺. Calculated for C₁₁H₁₁F₃N₄O: 272.088

Example 19

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(2-chlorophenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(19a rac)

A solution of n-butyllithium (2.5M in hexanes, 9.80 mL, 24.50 mmol) wasadded dropwise to a stirred solution of 1-chloro-2-iodobenzene (3.00 mL,24.62 mmol) in toluene (24 mL) and THF (8 mL) at −70° C. After completedaddition, the reaction mixture was stirred at −70° C. for 5 min.Subsequently, a solution of4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (16b rac, 1.4582g, 9.97 mmol) in toluene (6 mL) was added over a period of 9 min. After5 min stirring at that temperature boron fluoride diethyl etherate (1.30mL, 10.26 mmol) was added and the resulting reaction mixture was stirredat −70° C. for additional 30 min. A solution of saturated aqueous NH₄Cl(20 mL) was added and the cold bath was removed, allowing the reactionmixture to warm up to rt. The mixture was partitioned between water (20mL) and EtOAc (10 mL). The aqueous phase was extracted with EtOAc (2×30mL). The combined organic phases were washed with saturated aqueoussodium bicarbonate (50 mL), water (50 mL) brine (50 mL). The organicphase was dried over sodium sulfate and the filtrate was concentrated invacuo. The crude product was purified by silica gel flash chromatography(EtOAc in hexanes 0%-20%) to afford 1.3566 g of the title compound as ayellow oil. MS m/z=245.9 [M+H]⁺

¹H NMR (400 MHz, CHLOROFORM-d) δ=8.10-8.02 (m, 1H), 7.45-7.27 (m, 3H),7.12-6.80 (m, 1H), 6.27 (d, J=5.5 Hz, 1H), 4.08-4.00 (m, 1H), 2.73-2.64(m, 1H), 1.37 (dd, J=2.6, 5.0 Hz, 1H), 0.71 (dt, J=5.5, 8.5 Hz, 1H).

Steps 2-6:[(1R,S),(5S,R),(6R,S)]-5-(5-amino-2-chlorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19f-rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2-6 for the synthesis of 10f rac, but using [(1R,S),(4S,R),(5R,S)]-4-(2-chlorophenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(19a rac) MS m/z=287.9 [M+H]

¹H NMR (400 MHz, CDCl₃): δ 7.15 (d, J=8.4 Hz, 1H), 7.02 (d, J=2.7 Hz,1H), 6.81 (t, J=57.7 Hz, 1H), 6.55 (dd, J=8.4, 2.7 Hz, 1H), 4.66 (br s,2H), 3.82 (t, J=5.7 Hz, 2H), 3.69 (br s., 2H), 2.00-2.11 (m, 1H), 1.32(t, J=6.8 Hz, 1H), 0.93 (dt, J=9.7, 6.8 Hz, 1H)

Step 7:(1S,5R,6S)-5-(5-amino-2-chlorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19f-A) and(1R,5S,6R)-5-(5-amino-2-chlorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19f-B)

[(1R,S),(5S,R),(6R,S)]-5-(5-amino-2-chlorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f rac; 0.96 g) was subjected to chromatography using supercriticalCO₂ (additives 25% (MeOH with 20 mM NH₃) on a Chiralpak OJ-H column(20×250 mm, 5 μm) eluting at a flow rate 50 ml/min (165 bar pressure,40° C. column temperature). The first peak (retention time=0.87 min)provided(1S,5R,6S)-5-(5-amino-2-chlorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19f-A, 380 mg, 1.32 mmol, 40 yield; 99% de; 99% ee) as a light-yellowpowder. ¹H NMR (300 MHz, DMSO-d₆)=7.04 (d, J=8.3 Hz, 1H), 6.91-6.43 (m,3H), 5.80 (s, 2H), 5.23 (s, 2H), 3.88 (br. s., 1H), 1.86 (q, J=8.1 Hz,1H), 1.02 (br. s., 1H), 0.93-0.81 (m, 1H). Residual MeOH. MS m/z=287.9[M]+

The second peak (retention time=1.22 min) provided(1R,5S,6R)-5-(5-amino-2-chlorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19f-B, 380 mg, 1.32 mmol, 40% yield; 99% de; 99% ee) as a light-yellowpowder. ¹H NMR (300 MHz, DMSO-d₆)=7.05 (d, J=8.5 Hz, 1H), 6.92-6.44 (m,3H), 5.80 (s, 2H), 5.23 (s, 2H), 3.94-3.83 (m, 1H), 1.93-1.80 (m, 1H),1.02 (t, J=6.7 Hz, 1H), 0.87 (td, J=6.3, 9.4 Hz, 1H). Residual MeOH.

MS m/z=287.9 [M+H]

Step 8:(1S,2S)-2-((R)-1-amino-1-(2-chlorophenyl)-2,2-difluoroethyl)cyclopropanol(19b-A) and(1R,2R)-2-((S)-1-amino-1-(2-chlorophenyl)-2,2-difluoroethyl)cyclopropanol(19b-B)

[(1R,S),(2R,S)]-2-((S,R)-1-amino-1-(2-chlorophenyl)-2,2-difluoroethyl)cyclopropanol(19-b rac; 17.4 g) was subjected to chromatography using supercriticalCO₂ (additives 25% (MeOH with 20 mM NH₃) on a Chiralpak AD-H column(30×250 mm, 5 μm) eluting at a flow rate 120 ml/min (165 bar pressure,40° C. column temperature). The first peak (retention time=1.03 min)provided(1S,2S)-2-((R)-1-amino-1-(2-chlorophenyl)-2,2-difluoroethyl)cyclopropanol(19b-A, 6.39 g, 25.7 mmol, 40% yield; 99% de, 99% ee). MS m/z=248.0[M]+. The second peak (retention time=1.51 min) provided(1R,2R)-2-((S)-1-amino-1-(2-chlorophenyl)-2,2-difluoroethyl)cyclopropanol(19b-B, 6.39 g, 25.7 mmol, 40% yield; 99% de, 99% ee).

MS m/z=248.0 [M+H]⁺

Steps 9-11:(1R,5S,6R)-5-(2-chloro-5-nitrophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19e-B)

The title compound was prepared following procedures similar to thosedescribed in steps 3-5 for the synthesis of 19e rac, but using(1R,2R)-2-((S)-1-amino-1-(2-chlorophenyl)-2,2-difluoroethyl)cyclopropanol(19b-B). ¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.68-8.70 (m, 1H)8.11-8.16 (m, 1H) 7.60 (dd, J=8.90, 1.66 Hz, 1H) 6.85 (s, 1H) 6.71 (s,1H) 6.56-6.58 (m, 1H) 3.91-3.97 (m, 1H) 1.94-2.02 (m, 1H) 1.37-1.43 (m,1H) 1.02-1.10 (m, 1H) MS m/z=317.9 [M]+

Example 20

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(difluoromethyl)-4-(2,3-difluorophenyl)-2-oxa-3-azabicyclo[3.1.0]hexane(20a rac)

A solution of 1-bromo-2,3-difluorobenzene (1.1 ml, 9.83 mmol) in diethylether (60 mL) under nitrogen atmosphere was cooled to −78 C. A solutionof n-butyllithium (2.5 M in hexanes, 4 ml, 10.00 mmol) was addeddropwise and the reaction stirred for 20 minutes at −78 C. A secondflask was charged with a solution of4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (1.0 g, 7.51 mmol,16b rac) in toluene (20 mL) under nitrogen atmosphere and cooled to −78C. Boron fluoride diethyl etherate (1.0 ml, 8.10 mmol) was added and thereaction mixture stirred for 5 minutes. This solution was added to thearyl lithium solution via cannula. Upon complete addition, the reactionwas stirred for 10 minutes and then quenched by addition of aqueouscitric acid solution (10%; 5 mL). Water (50 mL) and ethyl acetate (100mL) were added and the organic layer was separated and dried overmagnesium sulfate. The solvent was evaporated under reduced pressure andthe crude residue was purified using silica chromatography (0-100% ethylacetate/hexanes) to give the title compound (1.33 g, 5.38 mmol, 71.6%yield).

MS m/z=248.0 [M+H]

Steps 2-6: [(1R,S), (5S,R),(6R,S)]-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2-6 for the synthesis of 10f rac, but using [(1R,S),(4S,R),(5R,S)]-4-(difluoromethyl)-4-(2,3-difluorophenyl)-2-oxa-3-azabicyclo[3.1.0]hexane(20a rac).

MS m/z=290.0 [M+H]

Step 7:(1S,5R,6S)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-A) and(1R,5S,6R)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-B)

[(1R,S), (5S,R),(6R,S)]-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f rac; 2.0 g) was subjected to chromatography using supercritical CO₂(additives 15% (EtOH with 20 mM NH₃) on a Chiralpak OJ-H column (21×250mm, 5 μm) eluting at a flow rate 50 ml/min (100 bar pressure, 40° C.column temperature). The first peak (retention time=2.7 min) provided((1S,5R,6S)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-A, 830 mg, 2.87 mmol, 41.5 yield; 99% de; 99% ee) as a light-yellowpowder.

1H NMR (CHLOROFORM-d) δ: 6.54 (ddd, J=5.2, 3.0, 1.8 Hz, 1H), 6.44 (ddd,J=11.2, 6.2, 2.9 Hz, 1H), 6.14 (td, J=56.1, 1.0 Hz, 1H), 4.91 (br. s.,2H), 3.81-3.94 (m, 1H), 3.66 (br. s, 2H), 1.72-1.84 (m, 1H), 1.33-1.43(m, 1H), 0.85-0.97 (m, 1H)

¹⁹F NMR (CHLOROFORM-d) δ: −127.37 (dd, J=275.9, 10.9 Hz, 1F), −129.71(dd, J=275.9, 7.5 Hz, 1F), −137.53 (d, J=21.8 Hz, 1F), −150.81 (ddd,J=21.9, 10.6, 7.5 Hz, 1F) MS m/z=290.0 [M+H]

The second peak (retention time=3.4 min) provided(1R,5S,6R)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-B, 840 mg, 2.90 mmol, 42% yield; 99% de; 99% ee) as a light-yellowpowder.

¹H NMR (CHLOROFORM-d) δ: 6.54 (ddd, J=5.2, 3.0, 1.8 Hz, 1H), 6.44 (ddd,J=11.3, 6.3, 2.9 Hz, 1H), 6.14 (td, J=55.9, 1.0 Hz, 1H), 4.84 (br. s.,2H), 3.84-3.93 (m, 1H), 3.64 (br. s., 2H), 1.73-1.84 (m, 1H), 1.33-1.42(m, 1H), 0.86-0.97 (m, 1H)

¹⁹F NMR (CHLOROFORM-d) δ: −127.40 (dd, J=275.9, 10.9 Hz, 1F), −129.72(dd, J=275.9, 7.5 Hz, 1F), −137.53 (d, J=21.8 Hz, 1F), −150.80 (ddd,J=21.8, 10.9, 7.5 Hz, 1F)

MS m/z=290.0 [M+H]⁺.

Example 21

Step 1: [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoro-3-methylphenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(21a rac)

A flask was charged with a solution of5-bromo-2-fluoro-1-iodo-3-methylbenzene (24.16 g, 77 mmol) in diethylether (143 ml) and the solution was cooled to −78° C. A solution ofn-butyllithium (2.5 M in hexanes, 30.7 ml, 77 mmol) was added drop wiseand the reaction mixture was stirred at −78° C. for 15 min. A separateflask was charged with a solution of [(1R,S),(5R,S)]-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (16b rac,6.6 g, 45.1 mmol) in toluene (158 ml) and the solution was cooled to−78° C. Boron trifluoride diethyl etherate (5.72 ml, 45.1 mmol) wasadded drop wise and the reaction mixture was stirred at −78° C. for 5min. This reaction mixture was transferred via cannula within 14 min tothe aryl lithium solution. The reaction mixture was stirred at −78° C.for 2 h, followed by quenching with saturated ammonium chloride solutionThe reaction mixture was warmed to RT and diluted with water and EtOAc.The organic layer was separated and the aqueous layer was washed withadditional EtOAc. The combined organic layers were washed with brine,dried over magnesium sulfate and the filtrate was concentrated underreduced pressure. The crude material was triturated with diethyl etherand the solids collected by vacuum filtration were washed with colddiethyl ether to afford a pale yellow solid. The filtrate wasconcentrated under reduced pressure and trituration was repeated toafford a second crop. The two crops were combined to afford the titlecompound (11.15 g, 34.6 mmol, 77% yield).

MS m/z=321.8 [M+H]⁺. Calculated for C₁₂H₁₁BrF₃NO: 322.1

Step 2: [(1R,S),(2R,S)]-2-[(S,R)-1-amino-1-(5-bromo-2-fluoro-3-methylphenyl)-2,2-difluoroethyl]cyclopropanol(21b rac)

The title compound was prepared following a procedure similar to thatdescribed in step 2 for the synthesis of 4b rac, but using [(1R,S),(4S,R),(5R,S)]-4-(5-bromo-2-fluoro-3-methylphenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(21a rac).

MS m/z=323.9 [M+H]⁺. Calculated C₁₂H₁₃BrF₃NO: 324.1difluoroethyl)cyclopropanol (21b-A) and(1R,2R)-2-((S)-1-amino-1-(5-bromo-2-fluoro-3-methylphenyl)-2,2-difluoroethyl)cyclopropanol(21b-B)

[(1R,S),(2R,S)]-2-[(S,R)-1-amino-1-(5-bromo-2-fluoro-3-methylphenyl)-2,2-difluoroethyl]cyclopropanol(21b rac, 13 g) was subjected to chromatography using supercritical CO₂(additives 25% (EtOH with 20 mM NH₃) on a Chiralpak ADH column (30×250mm, 5 μm) eluting at a flow rate 120 ml/min (100 bar pressure, 40° C.column temperature). The first peak (retention time=0.8 min) provided(1S,2S)-2-((R)-1-amino-1-(5-bromo-2-fluoro-3-methylphenyl)-2,2-difluoroethyl)cyclopropanol(21b-A, 5.3 g, 20.3 mmol, 40.5% yield; 99% de; 99% ee) as a light yellowpowder. The second peak (retention time=1.52 min) provided(1R,2R)-2-((S)-1-amino-1-(5-bromo-2-fluoro-3-methylphenyl)-2,2-difluoroethyl)cyclopropanol(21b-B, 5.2 g, 20.0 mmol, 40.0% yield; 99% de; 99% ee) as a light yellowpowder. MS m/z=323.9 [M+H]⁺. Calculated C₁₂H₁₃BrF₃NO: 324.1 for bothenantiomers.

Steps 4 and 5:N-((1R,5S,6R)-5-(5-amino-2-fluoro-3-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(21d-B)

The title compound was prepared following procedures similar to thosedescribed in steps 3 and 4 for the synthesis of 1i rac, but using(1R,2R)-2-((S)-1-amino-1-(5-bromo-2-fluoro-3-methylphenyl)-2,2-difluoroethyl)cyclopropanol(21b-B) MS m/z=390.0 [M+H]⁺. Calculated C₂₀H₁₈F₃N₃O₂: 389.4

Step 6:(1R,5S,6R)-5-(5-amino-2-fluoro-3-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(21e-B)

The title compound was prepared following a procedure similar to thatdescribed in step 4 for the synthesis of 4d rac, but usingN-((1R,5S,6R)-5-(5-amino-2-fluoro-3-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(21d-B). MS m/z=286.0 [M+H]⁺

Example 23

Step 1: [(1R,S), (4S,R),(5R,S)]-4-(3-bromophenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(23a rac)

A flask was charged with a solution of 1,3-dibromobenzene (2.72 ml,22.54 mmol) in diethyl ether (40 ml) and cooled to −78° C. A solution ofn-butyllithium (2.5M in hexanes, 2.034 ml, 22.54 mmol) was addeddropwise and the reaction mixture was allowed to stir at −78° C. for 1hour. A separate flask was charged with a solution of4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (16b rac, 1.000 g,7.51 mmol) in toluene (37.6 ml) and cooled to −78° C. Boron trifluorideetherate (1.020 ml, 8.26 mmol) was added and the reaction mixture wasallowed to stir for additional 5 minutes. The aryl lithium solution wastransferred via cannula to this reaction mixture and the resultingreaction mixture was allowed to stir at −78° C. for 30 minutes. Thereaction mixture was quenched with aqueous saturated NH₄Cl solution andthen allowed to warm to room temperature. Ethyl acetate (200 ml) wasadded, the layers was separated and the aqueous layer was extracted withethyl acetate. The combined organic extracts were dried over sodiumsulfate and the filtrate was concentrated in vacuo. The crude materialwas absorbed on silica gel and purified by silica gel chromatography,eluting with a gradient of 0-20% ethyl acetate/hexanes, to provide thetitle compound (1.392 g, 4.80 mmol, 63.9% yield) as a tan oil. MSm/z=290.9 [M+H]⁺. Calculated for C₁₁H₁₀BrF₂NO: 288.9.

¹H NMR (300 MHz, CHLOROFORM-d) d ppm 7.84 (t, J=1.97 Hz, 1H) 7.46-7.64(m, 2H) 7.24-7.32 (m, 1H) 5.92 (s, 1H) 4.08-4.17 (m, 1H) 2.21 (dd,J=4.75, 4.17 Hz, 1H) 1.36-1.43 (m, 1H) 0.73-0.82 (m, 1H)

Step 2-4: N-[(1R,S), (5S,R),(6R,S)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(23d rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2 to 4 for the synthesis of 1i rac, but using[(1R,S), (4S,R),(5R,S)]-4-(3-bromophenyl)-4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(23a rac)

MS m/z=358 [M+H]⁺. Calculated for C₁₉H₁₇F₂N₃O₂: 357.

Step 5:N-((1S,5R,6S)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(23d-A) andN-((1R,5S,6R)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(23d-B)

N-[(1R,S), (5S,R),(6R,S)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(23d rac, 0.787 g, 2.202 mmol) was subjected to chromatography usingsupercritical CO₂ (20% methanol with 20 mM ammonia) on a chiralcel OD-Hcolumn (21×250 mm, 5 μm) eluting at a flow rate 70 ml/min (165 barpressure, 40° C. column temperature). The first peak (retentiontime=1.49 min) providedN-((1S,5R,6S)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(23d-A, 0.350 g, 0.979 mmol, 44.5% yield; >98% de) as off-white solid.MS m/z=358 [M+H]⁺. Calculated for C₁₉H₁₇F₂N₃O₂: 357.

¹H NMR (400 MHz, CHLOROFORM-d) d ppm 8.22-8.27 (m, 2H) 7.49-7.55 (m, 1H)7.41-7.47 (m, 2H) 7.18-7.27 (m, 1H) 6.83 (d, J=8.61 Hz, 1H) 6.74 (br.s., 1H) 6.68 (d, J=8.41 Hz, 1H) 6.00-6.02 (m, 1H) 4.26 (m, 1H) 1.99 (m,1H) 1.69 (m, 1H) 1.21-1.27 (m, 1H).

The second peak (retention time=1.76) providedN-((1R,5S,6R)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(23d-B, 0.325 g, 0.909 mmol, 41.3% yield; >97% de) as off-white solid.MS m/z=358 [M+H]⁺. Calculated for C₁₉H₁₇F₂N₃O₂: 357.

¹H NMR (400 MHz, CHLOROFORM-d) d ppm 8.24 (d, J=7.04 Hz, 2H) 7.53 (br.s., 1H) 7.48-7.52 (m, 1H) 7.39-7.46 (m, 2H) 7.17-7.23 (m, 1H) 6.81 (s,1H) 6.66-6.74 (m, 2H) 6.00 (s, 1H) 4.20-4.27 (m, 1H) 1.91-1.99 (m, 1H)1.61-1.68 (m, 1H) 1.17-1.25 (m, 1H).

Example 24

Step 1: (S,R)-5-(chloromethyl)-3-(trifluoromethyl)-4,5-dihydroisoxazole(24a rac)

A solution of 2,2,2-trifluoro-N-hydroxyacetimidoyl bromide (13.0 g, 40.6mmol, WO2008135826) and 3-chloroprop-1-ene (10.0 mL, 123 mmol) indiethyl ether (50 mL) was cooled to 5° C. A solution of triethylamine(11.4 mL, 82 mmol) in diethyl ether (200 mL) was added over a period of3 h, keeping the internal temperature below 10° C. The cold bath wasremoved and the reaction mixture was stirred at rt for 2 h. Theprecipitate was filtered off and the filtrate was washed with water (300mL) and brine (300 mL). The organic phase was dried over sodium sulfateand the filtrate was concentrated in vacuo. The crude product waspurified by silica gel column chromatography (ether in hexanes 0 to 40%)to afford the title compound (3.16 g, 16.8 mmol) as a clear oil. ¹H NMR(300 MHz, CHLOROFORM-d) d=5.11 (dtd, J=4.2, 6.7, 10.9 Hz, 1H), 3.75-3.57(m, 2H), 3.41-3.09 (m, 2H).

Step 2: [(R,S),5(R,S)]-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (24b rac)

A solution of potassium 2-methylpropan-2-olate (1M in THF, 20.2 mL, 20.2mmol) was added over a period of 30 min to a stirred solution of(S,R)-5-(chloromethyl)-3-(trifluoromethyl)-4,5-dihydroisoxazole (24arac, 3.16 g, 16.8 mmol) in tetrahydrofuran (50 mL) at 0° C. After 45min, the reaction was quenched by addition of aqueous saturated ammoniumchloride solution. The cold bath was removed and the reaction mixturewas further diluted with aqueous saturated ammonium chloride solutionand diethyl ether. The phases were separated and the aqueous phase wasextracted with diethyl ether. The combined organic phases were washedwith water, brine and dried over sodium sulfate. The filtrate wasconcentrated in vacuo and the crude product was purified by silica gelcolumn chromatography (ether in pentanes 0 to 50%) to afford the titlecompound (1.50 g, 9.93 mmol) containing residual tetrahydrofuran andpentane. ¹H NMR (300 MHz, CHLOROFORM-d) δ=5.18 (dt, J=2.2, 5.4 Hz, 1H),2.85-2.69 (m, 1H), 1.19-1.08 (m, 1H), 0.46 (dt, J=1.9, 4.1 Hz, 1H).

Step 3:[1(R,S),4(S,R),5(R,S)]-4-(5-bromo-2-fluorophenyl)-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(24c rac)

A flask was charged with a solution of 4-bromo-1-fluoro-2-iodobenzene(5.00 ml, 16.6 mmol) in diethyl ether (25 mL) and the solution wascooled to −78° C. A solution of n-butyllithium (2.5 M in hexanes, 6.50ml, 16.25 mmol) was added dropwise and the reaction mixture was stirredat this temperature for 15 min. A separate flask was charged with asolution of [1(R,S),5(R,S)]-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (24b rac,1.25 g, 8.27 mmol) in toluene (73 mL) and cooled to −78° C. Borontrifluoride diethyl etherate (1.05 ml, 8.51 mmol) was added and thereaction mixture was stirred for 5 min at −78° C. This solution wasadded via cannula to the aryl lithium solution. The resulting reactionmixture was stirred at that temperature for 40 min and then quenched byadding aqueous saturated ammonium chloride. The cold bath was removedand the reaction mixture was allowed to warm to rt. The reaction mixturewas diluted with water and ethyl acetate. The layers were separated andthe aqueous phase was extracted with ethyl acetate. The combined organicphases were washed with brine and dried over sodium sulfate. Thefiltrate was concentrated in vacuo and the crude product was purified bysilica gel column chromatography (ethyl acetate in hexanes 0-30%) toafford the title compound (1.36 g, 4.16 mmol) as a pale orange solid.LC/MS (ESI⁺) m/z=326 (M+H).

Steps 4-7:[1(R,S),5(S,R),6(R,S)]-5-(5-amino-2-fluorophenyl)-5-(trifluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(24 g rue)

The title compound was prepared following procedures similar to thosedescribed in steps 2 to 4 for the synthesis of 4d rac, and step 9 forthe synthesis of 6h rac, but using[1(R,S),4(S,R),5(R,S)]-4-(5-bromo-2-fluorophenyl)-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(24c rac). LC/MS (ESI⁺) m/z=290 (M+H).

Example 25

Step 1:[1(R,S),4(S,R),5(R,S)]-4-(3-bromophenyl)-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(25a rac)

A flask was charged with a solution of 1,3-dibromobenzene (1.90 mL,15.72 mmol) in Et₂O (30 mL) and the solution was cooled to −78° C. Asolution of n-butyllithium (2.5 M in hexanes, 6.20 mL, 15.50 mmol) wasadded dropwise and the reaction mixture was stirred at this temperaturefor 40 min. A separate flask was charged with a solution of[1(R,S),5(R,S)]-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene(24b rac 1.90 g, 7.92 mmol) in toluene (70 mL) and cooled to −78° C.Boron trifluoride diethyl etherate (1.0 mL, 8.10 mmol) was added and thereaction mixture was stirred for 40 min at −78° C. This solution wasadded via cannula to the aryl lithium solution. The resulting reactionmixture was stirred at that temperature for 40 min and then quenched byadding aqueous saturated ammonium chloride. The cold bath was removedand the reaction mixture was allowed to warm to rt. The reaction mixturewas diluted with water and ethyl acetate. The layers were separated andthe aqueous phase was extracted with ethyl acetate. The combined organicphases were washed with brine and dried over sodium sulfate. Thefiltrate was concentrated in vacuo and the crude material was purifiedby silica gel chromatography, eluting with 10-30% EtOAc in hexanes, toprovide the title compound (0.502 g, 1.63 mmol) as a brown oil. LC/MS(ESI⁺) m/z=308.3 (M+H).

Steps 2-5:[1(S,R),5(R,S),6(S,R)-5-(3-aminophenyl)-5-(trifluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(25e rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2 to 4 for the synthesis of 4d rac, and step 9 forthe synthesis of 6h rac, but using[1(R,S),4(S,R),5(R,S)]-4-(3-bromophenyl)-4-(trifluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(25a rac). LC/MS (ESI⁺) m/z=272.0 (M+H).

Example 26

Step 1-2: 4-(Methoxymethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (26b rac)

To a solution of (5-(chloromethyl)-4,5-dihydroisoxazol-3-yl)methanol (6crac, 2.2 g, 14.71 mmol) in THF (40 mL) was added sodium hydride (60%dispersion in mineral oil, 0.372 ml, 17.65 mmol). The resulting mixturewas stirred for 15 min followed by dropwise addition of methyl iodide(1.005 ml, 16.18 mmol). After 15 min, the reaction mixture was carefullyquenched with aqueous saturated ammonium chloride solution and dilutedwith water. The phases were separated and the aqueous phase wasextracted with Et₂O. The combined organic layers were dried over Na₂SO₄and the filtrate was concentrated under reduced pressure to afford thetitle compound as a pale yellow oil. The oil was dissolved in THF (20mL) and the solution was cooled 0° C. A solution of potassiumtert-butoxide (1M in THF, 17.65 ml, 17.65 mmol) was added dropwise andthe reaction mixture was stirred for 30 min at 0° C. The mixture wasquenched with aqueous saturated ammonium chloride solution, the phaseswere separated and the aqueous phase was extracted with EtOAc. Thecombined organic layers were dried over Na₂SO₄ and the filtrate wasconcentrated under reduced pressure to afford the title compound as anorange oil as MS m/z=128.1[M+H]⁺. Calculated for C₆H₉NO₂:127.06.

Step 3: [(1R,S), (4S,R),(5R,S)]-4-(5-bromo-2-fluorophenyl)-4-(methoxymethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(26c rac)

A flask was charged with a solution of 4-bromo-1-fluoro-2-iodobenzene(3.55 ml, 11.80 mmol) in Et₂O (40 mL) and the solution was cooled to−78° C. A solution of n-butyllithium (2.5M in hexanes, 4.72 ml, 11.80mmol) was added dropwise and the reaction mixture was stirred at thistemperature for 20 min. A separate flask was charged with a solution of4-(methoxymethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (26b rac, 1.0 g,7.87 mmol) in toluene (10 mL) and cooled to −78° C. Boron trifluoridediethyl etherate (1.019 ml, 8.26 mmol) was added dropwise and theresulting reaction mixture was stirred at −78° C. for 5 min. Thissolution was added via cannula to the aryl lithium solution. Theresulting reaction mixture was stirred at that temperature for 30 minand subsequently quenched with aqueous saturated ammonium chloridesolution. The reaction mixture was allowed to warm to room temperatureand diluted with EtOAc and water. The aqueous phase was extracted withEtOAc (2×) and the combined organics were dried over Na₂SO₄. Thefiltrate was concentrated under reduced pressure and the residue waspurified by silica gel chromatography (0-10% EtOAc/hexanes) to affordthe title compound as a light yellow oil (0.500 g, 1.655 mmol, 21.04%yield). MS m/z=301.9 [M+H]⁺. Calculated for C₁₂H₁₃BrFNO₂:301.01.

Steps 4-7: [(1R,S), (5S,R),(6R,S)]-5-(5-amino-2-fluorophenyl)-5-(methoxymethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(26g rac)

The title compound was prepared following procedures similar to thosedescribed in steps 2 to 4 for the synthesis of 4d rac, and step 9 forthe synthesis of 6h rac, but using [(1R,S), (4S,R),(5R,S)]-4-(5-bromo-2-fluorophenyl)-4-(methoxymethyl)-2-oxa-3-azabicyclo[3.1.0]hexane(26c rac). MS m/z=266 [M+H]⁺. Calculated for C₁₃H₁₆FN₃O₂:265.12

Example 27

Step 1:(1R,5S,6R)-5-(difluoromethyl)-5-(2-methyl-5-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(27a-B)

A flask was charged with(1R,5S,6R)-5-(2-chloro-5-nitrophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(19e-B 0.248 g, 0.781 mmol), cesium carbonate (0.763 g, 2.342 mmol) anda solvent mixture of THF (14.87 ml)/water (0.74 ml). The reactionmixture was purged with nitrogen gas for 5 min. Then1,1′-bis(diphenylphosphino)ferrocene palladium(II)dichloridedichloromethane adduct (0.064 g, 0.078 mmol) and methylboronic acid(0.935 g, 15.61 mmol) were added. The flask was fitted with a refluxcondensor, and the reaction mixture was heated under reflux overnight.Additional methylboronic acid (0.935 g, 15.61 mmol) and1,1′-bis(diphenylphosphino)ferrocene palladium(II)dichloridedichloromethane adduct (0.064 g, 0.078 mmol) were added and stirring wascontinued at 88° C. overnight. The reaction mixture was cooled toambient temperature and diluted with ethyl acetate (50 ml). The mixturewas filtered through a pad of celite and the filter cake was rinsed withdichloromethane (2×). The combined organic extracts were concentrated invacuo and. the crude material was purified by silica gel chromatography,eluting with a gradient of 0-55% ethyl acetate/hexanes, to provide amixture of(1R,5S,6R)-5-(difluoromethyl)-5-(2-methyl-5-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(27a-B) and(1R,5S,6R)-5-(difluoromethyl)-5-(3-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.229 g, 77:23 ratio). MS m/z=298 [M+H]⁺. Calculated for 27a-BC₁₃H₁₃F₂N₃O₃: 297; MS m/z=284 [M+H]⁺Calculated for C₁₂H₁₁F₂N₃O₃: 283

Step 2:(1R,5S,6R)-5-(5-amino-2-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(27b-B)

A flask was charged with a 77:23 mixture of(1R,5S,6R)-5-(difluoromethyl)-5-(2-methyl-5-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(27a-B, 0.225 g, 0.757 mmol) and(1R,5S,6R)-5-(difluoromethyl)-5-(3-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineGlacial acetic acid (0.262 ml, 4.54 mmol) and TFA (0.394 ml, 5.30 mmol)were added, followed by zinc (0.247 g, 3.78 mmol). The reaction mixturewas allowed to stir for 30 min and was then diluted with methanol (5ml). The suspension was filtered and the filtrate was concentrated invacuo. The crude material was purified by chromatography, eluting with agradient of 0-10% MeOH/DCM, to provide a 85:15 mixture of(1R,5S,6R)-5-(5-amino-2-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(27b-B) and(1R,5S,6R)-5-(3-aminophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.113 g) as off-white solid. The mixture was used in the next stepwithout further purification.

MS m/z=268 [M+H]⁺. Calculated for 27b-B C₁₃H₁₅F₂N₃O: 267.

MS m/z=254 [M+H]⁺. Calculated for C₁₂H₁₃F₂N₃O: 253.

Example 28

Step 1: [(1R,S), (4S,R) (5R,S)],4-(difluoromethyl)-4-(3-fluoro-2-methylphenyl)-2-oxa-3-azabicyclo[3.1.0]hexane(28a rac)

To a flame dried RBF was added a solution of n-butyllithium (2.5M inhexanes; 3.01 ml, 7.51 mmol) and diethyl ether (15 ml). The solution wascooled to −78° C., and 2-fluoro-6-iodotoluene (0.981 ml, 7.51 mmol) wasadded dropwise and the reaction was stirred at −78° C. for 10 minutes. A−78° C. premixed solution of4-(difluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (1.00 g, 7.51mmol) and boron trifluoride diethyl etherate (0.927 ml, 7.51 mmol) intoluene (10 ml) was added to the reaction via syringe. The reaction wasstirred at −78° C. for 10 minutes, quenched with saturated ammoniumchloride and warmed to RT. The reaction was diluted with water andEtOAc. The organic layer was separated and concentrated under reducedpressure. The crude residue was purified via silica gel flashchromatography eluting with 0-20% ethyl acetate in hexanes to afford4-(difluoromethyl)-4-(3-fluoro-2-methylphenyl)-2-oxa-3-azabicyclo[3.1.0]hexane(0.81 g, 3.33 mmol, 44.3% yield).

LC/MS (ESI⁺) m/z=244.1 (M+H).

Step 2: [(1R,S),(2R,S)]-2-4S,R)-1-amino-2,2-difluoro-1-(3-fluoro-2-methylphenyl)ethyl)cyclopropanol(28b rac)

To a solution of4-(difluoromethyl)-4-(3-fluoro-2-methylphenyl)-2-oxa-3-azabicyclo[3.1.0]hexane(0.81 g, 3.33 mmol) in acetic acid, glacial (7.69 ml, 133 mmol) wasadded zinc (1.306 g, 19.98 mmol) portionwise at RT followed bytrifluoroacetic acid (2.474 ml, 33.3 mmol). The reaction was stirred atRT for 1 hour. The reaction was filtered through a pad of celite andconcentrated under vacuum. The residue was dissolved in iced water andthe solution was basified by the addition of 5N NaOH to pH 12. The basicaqueous layer was back extracted with EtOAc. The organic layer waswashed with brine, dried over sodium sulfate, and concentrated todryness to afford the title compound2-(1-amino-2,2-difluoro-1-(3-fluoro-2-methylphenyl)ethyl)cyclopropanol(0.61 g, 2.487 mmol, 74.7% yield). LC/MS (ESI⁺) m/z=246.1 (M+H).

Step 3: N-[(1R,S), (5S,R),(6R,S)]-(5-(difluoromethyl)-5-(3-fluoro-2-methylphenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(28c rac)

To a solution of2-(1-amino-2,2-difluoro-1-(3-fluoro-2-methylphenyl)ethyl)cyclopropanol(0.61 g, 2.487 mmol) in dry THF (10 mL) under nitrogen was added benzoylisothiocyanate (0.7 ml, 5.20 mmol) dropwise and the reaction was stirredfor 30 min. Diisopropylethylamine (1.731 ml, 9.95 mmol) and1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.954 g,4.97 mmol) were added and the reaction stirred at room temperature for 1hour and then warmed to 60° C. for another 12 hr. The reaction mixturewas diluted with dichloromethane and water. The phases were mixed,separated, and the organic was evaporated to dryness under reducedpressure. The crude residue was purified via silica gel flashchromatography eluting with 0-30% ethyl acetate in hexane afforded thetitle compoundN-(5-(difluoromethyl)-5-(3-fluoro-2-methylphenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(0.8 g, 2.137 mmol, 86% yield). LC/MS (ESI⁺) m/z=375.0 (M+H).

Step 4: [(1R,S), (5S,R),(6R,S)]-5-(difluoromethyl)-5-(3-fluoro-2-methylphenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(28d rac)

N-(5-(difluoromethyl)-5-(3-fluoro-2-methylphenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(1.0 g, 2.67 mmol) was dissolved in methanol (50 mL) under nitrogen and1,8-diazabicyclo-[5.4.0]undec-7-ene (0.798 ml, 5.34 mmol) was added. Thereaction was heated to 40° C. After 18 hours, the reaction mixture wasconcentrated to dryness under reduced pressure and the residuepartitioned between water and ethyl acetate. The organic layer wasisolated and concentrated under reduced pressure. The crude residue waspurified via silica gel flash chromatography eluting with 0-60% ethylacetate in hexanes afforded the title compound5-(difluoromethyl)-5-(3-fluoro-2-methylphenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.470 g, 1.739 mmol, 65.1% yield). LC/MS (ESI⁺) m/z=270.9 (M+H).

Step 5: [(1R,S), (5S,R),(6R,S)]-5-(difluoromethyl)-5-(3-fluoro-2-methyl-5-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(28e rac)

5-(Difluoromethyl)-5-(3-fluoro-2-methylphenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.470 g, 1.739 mmol) was dissolved in sulfuric acid, 95% (5 mL) andcooled in an ice bath. Sodium nitrate (0.177 g, 2.087 mmol) was added inone portion and the reaction stirred for 5 minutes. The reaction waswarmed to rt and stirred for 1 hr and poured into a mixture ofdichloromethane (50 mL), iced water (90 mL), and potassium phosphatetribasic (20.02 g, 87 mmol). The mixture was stirred for 5 minutes thensaturated sodium bicarbonate was added slowly until pH 8. The phaseswere separated and the aqueous extracted with ethyl acetate (2×50 mL).The combined organic layers were dried over magnesium sulfate andevaporated under reduced pressure. The crude residue was purified viasilica gel flash chromatography eluting with 0-30% hexane to ethylacetate to afford the title compound5-(difluoromethyl)-5-(3-fluoro-2-methyl-5-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.22 g, 0.698 mmol, 40.1% yield). LC/MS (ESI⁺) m/z=316.1 (M+H).

Step 6: [(1R,S), (5S,R),(6R,S)]-5-(5-amino-3-fluoro-2-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(28f rac)

5-(Difluoromethyl)-5-(3-fluoro-2-methyl-5-nitrophenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(200 mg, 0.634 mmol) was dissolved in THF (20 ml). 10% palladium oncarbon (135 mg, 0.127 mmol) was added and the reaction mixture was putunder a balloon of H₂ and stirred at 18° C. for 4 h. The mixture wasfiltered through a pad of celite, washing well with ethyl acetate. Thefiltrate was concentrated under vacuum to yield crude5-(5-amino-3-fluoro-2-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(140 mg, 0.491 mmol, 77% yield) as a gray foam. LC/MS (ESI⁺) m/z=286.2(M+H)

Intermediate 1

Synthesis of 8-Chloro-3-methoxy-1,7-naphthyridine Step 1:3-chloro-5-methoxypicolinonitrile

To a solution of 3,5-dichloropicolinonitrile (22.5 g, 130 mmol) in DMF(500 mL) at 0° C. was added sodium methoxide (6.67 g, 124 mmol) slowly.The reaction was stirred for 5 minutes at 0° C., then it was allowed towarm to RT and stir for 30 minutes. The solution was partitioned betweenwater and EtOAc. The organic layer was washed with water andconcentrated. The crude product was purified via silica gelchromatography, eluting with 0-75% ethyl acetate in heptanes, to afforda 1:1 ratio of the desired isomer 3-chloro-5-methoxypicolinonitrile and5-chloro-3-methoxypicolinonitrile (7.0 g, 41.5 mmol). The material wasused without further purification. MS m/z=169 (M+H).

Step 2: 5-Methoxy-3-((triethylsilyl)ethynyl)picolinonitrile

A sealed vessel was charged with bis(acetonitrile)palladium (II)chloride (0.154 g, 0.593 mmol),dicyclohexyl(2′,4′,6′-triisopropyl-[1,1′-biphenyl]-2-yl)phosphine (0.848g, 1.780 mmol), cesium carbonate (25.1 g, 77 mmol), the product ofIntermediate 1, step 1 (5 g, 29.7 mmol), and ACN (60 mL). The vessel wasflushed with argon, sealed, and stirred at RT for 25 minutes. To thereaction was added triethyl(ethynyl)silane (5.41 g, 38.6 mmol), and thevessel was resealed and stirred at 90° C. for 3 hours. The solution wasconcentrated, and the residue was purified via silica gelchromatography, eluting with 0-50% ethyl acetate in heptanes, to affordthe title compound (3.8 g, 13.9 mmol). MS m/z=273 (M+H)⁺.

Step 3: 3-(2,2-Dimethoxyethyl)-5-methoxypicolinonitrile

A pressure vessel was charged with 5-methoxy-3-((triethylsilyl)ethynyl)picolinonitrile (3.8 g, 13.95 mmol) and sodium methoxide (0.5 M inmethanol, 69.7 mL, 34.9 mmol). The vessel was sealed and stirred at 55°C. for 2 hours. The reaction was concentrated to afford the titleintermediate (3.1 g, 13.95 mmol).

Step 4: 3-(2,2-dimethoxyethyl)-5-methoxypicolinamide

To a 1 L round-bottomed flask was added3-(2,2-dimethoxyethyl)-5-methoxypicolinonitrile (8.550 g, 38.5 mmol),water (480 ml), and acetone (120 ml). An aqueous solution of sodiumcarbonate (3M; 154 ml, 462 mmol) was added followed by hydrogen peroxide(35 wt. % solution in water; 138 ml, 1347 mmol). The tan mixture wasstirred vigorously at rt for 2 h. The organic solvent was removed underreduced pressure and the aqueous residue was extracted with DCM (3×).The combined organic fractions were dried over sodium sulfate. Thefiltrate was concentrated under reduced pressure to afford3-(2,2-dimethoxyethyl)-5-methoxypicolinamide (8.200 g, 34.1 mmol, 89%yield) as an off-white solid that was advanced without furtherpurification. MS m/z=263.2 (M+Na)⁺

Step 5: 3-Methoxy-1,7-naphthyridin-8(7H)-one

To a mixture of 3-(2,2-dimethoxyethyl)-5-methoxypicolinamide (6.74 g,28.1 mmol) in toluene (112 ml) was added 4-methylbenzene sulfonic acid(monohydrate; 0.534 g, 2.81 mmol). The reaction mixture was heated toreflux for 20 h. The reaction mixture was cooled to rt and concentratedin vacuo to a volume of ca. 15 mL. The residue was triturated withheptanes and filtered to afford 3-methoxy-1,7-naphthyridin-8(7H)-one(4.53 g, 25.7 mmol, 92% yield) as a crude, tan solid that was advancedwithout further purification. MS m/z=177.1 [M+H]⁺

Step 6: 8-Chloro-3-methoxy-1,7-naphthyridine

To a mixture of 3-methoxy-1,7-naphthyridin-8(7H)-one (4.50 g, 25.5 mmol)in acetonitrile (102 ml) was added phosphorus oxychloride (11.69 ml, 128mmol). The reaction mixture was heated to 85° C. for 5 h. The solutionwas cooled to rt and concentrated in vacuo. The resulting brown residuewas partitioned between CH2Cl2 and aqueous saturated NaHCO3 solution;the aqueous layer was back-extracted with DCM (3×). The combined organicextracts were dried over sodium sulfate, the filtrate was concentratedin vacuo, and the residue was purified by silica gel chromatography(5%-30% of 9:1 DCM:MeOH in DCM) to afford8-chloro-3-methoxy-1,7-naphthyridine (3.00 g, 15.41 mmol, 60.3% yield)as an off-white solid. MS m/z=195 (M+H)⁺.

Intermediate 2

Synthesis of 3,8-Dichloro-1,7-naphthyridine Step 1:3-Bromo-5-chloropicolinonitrile

A microwave vial was charged with copper (I) cyanide (1.089 g, 12.16mmol), 2,3-dibromo-5-chloropyridine (3 g, 11.06 mmol), and propionitrile(15 mL). The vial was capped and irradiated in a microwave reactor at150° C. for 2.5 hours. The solution was concentrated, diluted with DCM(25 mL), and filtered. The filtrate was concentrated, and the residuewas purified by silica gel chromatography, eluting with 0-30% EtOAc inheptanes, to afford the title compound (2 g, 9.20 mmol). MS m/z=219(M+H)⁺.

Step 2: 5-Chloro-3-((trimethylsilyl)ethynyl)picolinonitrile

A pressure vessel was charged with TEA (7.65 mL, 55.2 mmol),ethynyltrimethylsilane (2.32 mL, 16.6 mmol), copper (I) iodide (0.263 g,1.380 mmol), palladium (0) tetrakis(triphenylphosphine) (0.558 g, 0.483mmol), 3-bromo-5-chloropicolinonitrile (3.0 g, 13.8 mmol), and DMF (50ml). The vessel was flushed with argon, sealed, stirred at ambienttemperature for 15 minutes, and then heated at 50° C. for 4 hours. Thesolution was diluted with water and extracted with EtOAc. The combinedorganic layers were concentrated, and the residue was purified bysilica-gel chromatography, eluting 0-50% ethyl acetate in hexane, toafford the title compound (1.3 g, 5.5 mmol). MS m/z=235 (M+H)⁺.

Step 3: 5-Chloro-3-(2,2-dimethoxyethyl)picolinonitrile

A pressure vessel was charged with5-chloro-3-((trimethylsilyl)ethynyl)picolinonitrile (2 g, 8.52 mmol) andsodium methoxide (0.5 M in methanol, 42.6 mL, 21.30 mmol), sealed, andstirred at 55° C. for one hour. The solution was concentrated, and theresidue was purified via silica gel chromatography, eluting with 10%methanol in DCM to afford the title compound (1.7 g, 7.50 mmol). MSm/z=227 (M+H)⁺.

Step 4: 3-Chloro-1,7-naphthyridin-8(7H)-one

To a solution of 5-chloro-3-(2,2-dimethoxyethyl)picolinonitrile (1.7 g,7.50 mmol) in acetone (50 mL) and water (150 mL) was added aqueoussaturated sodium carbonate (37.5 mL, 113 mmol) and 30% aqueous hydrogenperoxide (38.3 mL, 375 mmol). The reaction was stirred at RT for onehour, concentrated to remove most of the acetone, and extracted withDCM. The combined organic layers were concentrated.

To a solution of this intermediate (1.8 g, 7.36 mmol) in benzene (20 mL)was added p-toluenesulfonic acid (0.350 g, 1.839 mmol) and the reactionwas sonicated for 10 minutes. The solution was stirred overnight at 80°C. and concentrated. The crude product was purified via silica gel,eluting with 0-100% (80/20/1 ethyl acetate/methanol/ammonium hydroxide)in EtOAc, to the title intermediate (1.1 g, 6.1 mmol). MS m/z=181(M+H)⁺.

Step 5: 3,8-Dichloro-1,7-naphthyridine

A suspension of -chloro-1,7-naphthyridin-8(7H)-one (250 mg, 1.384 mmol)in phosphorus oxychloride (1.94 mL, 20.8 mmol) was stirred at 95° C. forone hour. The solution was concentrated to afford the title compound(276 mg, 1.39 mmol). MS m/z=199 (M+H)⁺.

Intermediate 3

Synthesis of 5-Chloro-2-methoxypyrido[3,4-b]pyrazine Step 1:5-Chloropyrido[3,4-b]pyrazin-2(1H)-one

A suspension 2-chloropyridine-3,4-diamine (2.5 g, 17.41 mmol) and a 50%solution of ethyl glyoxalate in toluene (3.45 mL, 17.41 mmol) in ethanol(34.8 mL) was stirred at reflux for 24 hours. The solution was cooled to−20° C. for 16 hours, and the resulting precipitate was collected byvacuum filtration and rinsed with ethanol. The crude product waspurified via reverse-phase HPLC, eluting with 5-50% acetonitrile/0.1%trifluoroacetic acid in water/0.1% TFA, to afford the title compound(570 mg, 3.14 mmol). MS m/z=182 (M+H)⁺.

Step 2: 2,5-Dichloropyrido[3,4-b]pyrazine

A suspension of 5-chloropyrido[3,4-b]pyrazin-2(1H)-one (0.57 g, 3.14mmol) in phosphorus oxychloride (10.24 mL, 110 mmol) was stirred at 110°C. for two hours, and then concentrated. The residue was dissolved inDCM, washed with saturated sodium bicarbonate, dried over anhydroussodium sulfate, filtered, and concentrated to afford the title compound(580 mg, 2.90 mmol). MS m/z=200 (M+H)⁺.

Step 3: 5-Chloro-2-methoxypyrido[3,4-b]pyrazine

To a solution of 2,5-dichloropyrido[3,4-b]pyrazine (580 mg, 2.90 mmol)in N,N-dimethylformamide (10 mL) was added a 0.5-M solution of sodiummethoxide in methanol (6.09 mL, 3.04 mmol), and the reaction was stirredat RT for 5 minutes. The solution was diluted with water and extractedwith ethyl acetate. The organic layer was dried with sodium sulfate,filtered and concentrated to afford the title compound (550 mg, 2.81mmol). MS m/z=196 (M+H)⁺.

Intermediate 4

Synthesis of 8-Chloro-1,7-naphthyridine-3-carbonitrile

A screw-cap vial was charged with 3-chloro-1,7-naphthyridin-8(7H)-one(100 mg, 0.554 mmol), zinc cyanide (52.7 μl, 0.831 mmol),2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (45.5 mg, 0.111 mmol),tris(dibenzylideneacetone)dipalladium(0) (40.6 mg, 0.044 mmol), DMF(2.74 mL) and water (28 μL). The vial was purged with argon, sealed, andstirred at 110° C. for 1 hour. The mixture was filtered through a pad ofCelite, which was rinsed with methanol and dimethylsulfoxide. Thecombined filtrates were concentrated, and a few drops of water wereadded. The resulting solids were collected by vacuum filtration, rinsedwith water and dried. The solids were suspended in toluene (3.5 mL), andphosphorus oxychloride (98 μL, 1.052 mmol) and DIPEA (122 μL, 0.701mmol) were added. The reaction was stirred at 120° C. for 1.5 hours,cooled to RT, diluted with EtOAc, and washed with 2 M aqueous sodiumcarbonate. The organic portion was dried over anhydrous sodium sulfate,filtered and concentrated. The crude material was purified by silica gelchromatography, eluting with 5-50% EtOAc in heptanes, to provide thetitle compound (50 mg, 0.264 mmol) as a white solid. LC/MS (ESI⁺)m/z=190 (M+H)⁺.

Intermediate 5

Step 1: methyl 5-(2,2,2-trifluoroethoxy)picolinate

To a solution of methyl 5-hydroxypicolinate (0.50 g, 3.27 mmol, FrontierScientific) in DMF (5 mL) were added cesium carbonate (1.383 g, 4.24mmol, Aldrich) and 2,2,2-trifluoroethyl ester (0.909 ml, 3.92 mmol) andthe resulting suspension was stirred at RT for 1 hour. The reaction wasdiluted with water and EtOAc. The organic layer was washed with 1M LiC1(aq) solution and brine before drying over magnesium sulfate andconcentrating under reduced pressure to afford the crude title compoundas a yellow oil, which was used directly in the next step withoutfurther purification. M/S m/z=236.0 [M+H]⁺. Calculated for C₉H₈F₃NO₃:235.160

Step 2: 5-(2,2,2-trifluoroethoxy)picolinic acid

The crude material from the previous reaction was taken up in THF (5 mL)and lithium hydroxide, 2.0M, (aq) (4.90 ml, 9.80 mmol) was added. Thereaction was stirred at RT for 16 hours. The reaction was diluted withwater and acidified with 1.0N HCl (aq) solution was added until pH=1 (bypH paper). The solution was extracted with DCM and the organic layer waswashed with brine, dried over magnesium sulfate and concentrated underreduced pressure to afford the title compound as a white solid. (0.194g, 0.877 mmol, 26.9% yield). M/S m/z=221.9 [M+H]⁺. Calculated forC₈H₆F₃NO₃: 221.133 ¹H NMR (300 MHz, DMSO-d₆) δ ppm 5.00 (q, J=8.77 Hz,2H) 7.66 (dd, J=8.77, 2.92 Hz, 1H) 8.07 (d, J=8.77 Hz, 1H) 8.50 (d,J=2.92 Hz, 1H) 13.00 (br. S., 1H)

Intermediate 6

Step 1: Synthesis of 5-chloro-3-methylpicolinonitrile

A mixture of 2-bromo-5-chloro-3-methylpyridine (45 g, 218 mmol), zinccyanide (8.30 mL, 131 mmol), tris (dibenzylideneacetone) dipalladium (0)(4.99 g, 5.45 mmol), and 1,1′-bis(diphenylphosphino)ferrocene (6.04 g,10.90 mmol) in dimethylacetamide (40 mL) was heated to 110° C. for 4hours. The reaction mixture was cooled to RT, diluted with water andextracted with ethyl acetate. The organic phase obtained wasconcentrated under reduced pressure and residue purified bychromatography on silica gel using ISCO eluting with 0-60% EtOAc/hex toafford the title compound 5-chloro-3-methylpicolinonitrile (25.4 g, 166mmol, 76% yield). LC/MS (ESI⁺) m/z=153.1 (M+H).

Step 2: Synthesis of 5-chloro-3-methylpicolinic acid

To a solution of 5-chloro-3-methylpicolinonitrile (24.0 g, 157 mmol) inEtOH (100 mL) was added NaOH 5.0N (110 ml, 550 mmol). The resultingmixture was refluxed at 90° C. for 18 h. After cooling to RT, thereaction mixture was concentrated, diluted with water and the pH of thesolution was adjusted to 4 by addition of 5N HCl. The solid thatprecipitated was filtered and set aside. The filtrate was extracted withEtOAc (2×). The aqueous layer was again acidified with 5N HCl to pH 4and extracted with EtOAc (2×). The EtOAc extracts were combined, dried,and concentrated. The solid obtained from all the workup steps werecombined and dried in a high vac oven at 40° C. for 12 h to give thetitle compound 5-chloro-3-methylpicolinic acid (24.1 g, 140 mmol, 89%yield). LC/MS (ESI⁺) m/z=172.0 (M+H)⁺; ¹H NMR (400 MHz, CHLOROFORM-d) δppm 11.29 (br. s., 1H), 8.41 (d, J=1.76 Hz, 1H), 7.73 (d, J=1.76 Hz,1H), 2.75 (s, 3H).

Intermediate 7

Synthesis of 3,8-Dichloro-5-fluoro-1,7-naphthyridine Step 1:3-chloro-5-fluoro-6-methoxy-6,7-dihydro-1,7-naphthyridin-8(5H)-one

A pressure bottle was charged with 3-chloro-1,7-naphthyridin-8(7H)-one(15 g, 83 mmol, Anichem), methanol (34.6 mL), ACN (173 mL) and1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octanebis(tetrafluoroborate) (30.9 g, 87 mmol), and the mixture was heated at45° C. for 15 hours. Water and ethyl acetate were added, and the layerswere separated. The aqueous portion was extracted twice with ethylacetate and once with DCM, and the combined organic layers were driedwith anhydrous sodium sulfate, filtered and concentrated. The crudesolid was triturated with a minimum amount of ethyl acetate andfiltered. The title intermediate was isolated as an off-white solid(15.34 g, 80%) as a 3:1 mixture of diastereomers.

Step 2: 3,8-dichloro-5-fluoro-1,7-naphthyridine

A vial was charged with3-chloro-5-fluoro-6-methoxy-6,7-dihydro-1,7-naphthyridin-8(5H)-one (7.5g, 32.5 mmol), acetonitrile (130 mL) and phosphorus oxychloride (9.09mL, 98 mmol), and the mixture was stirred at 75° C. for 15 hours. Themixture was concentrated, and the crude material was purified by silicagel chromatography, eluting with 0-50% ethyl acetate in heptanes, toprovide the title compound (5.57 g, 25.7 mmol, 79% yield) as a whitesolid. LC/MS (ESI⁺) m/z=217(M+H)⁺.

Intermediate 8

Synthesis of 8-Chloro-5-fluoro-3-methoxy-1,7-naphthyridine

Using an analogous sequence of reactions to those described forIntermediate 7, 3-methoxy-1,7-naphthyridin-8(7H)-one was converted tothe title compound. LC/MS (ESI⁺) m/z=213 (M+H)⁺.

Intermediate 9

Synthesis of 4,7-Dichloropyrido[3,2-d]pyrimidine Step 1:3-Amino-5-chloropicolinamide

To a suspension of 5-chloro-2-cyano-3-nitropyridine (1.274 mL, 10.9mmol) in water (22 mL) was added 28% aqueous ammonium hydroxide (3.94mL, 28.3 mmol), and the reaction was stirred at RT for 20 minutes.Sodium hydrosulfite (2.68 mL, 32.7 mmol) was added, and the reactionmixture was stirred at RT for 70 minutes. The yellow precipitate wascollected by vacuum filtration to provide the title compound (1.097 g,6.39 mmol) as yellow solid. ¹H-NMR (400 MHz, DMSO-d₆): δ 7.88 (br. s,1H), δ 7.73 (s, 1H), δ 7.39 (br. s, 1H), δ 7.23 (s, 1H), δ 7.06 (br. s,2H). LC/MS (ESI⁺) m/z=172 (M+H)⁺.

Step 2: 7-Chloropyrido[3,2-d]pyrimidin-4(1H)-one

A suspension of 3-amino-5-chloropicolinamide (1.1 g, 6.41 mmol) intriethyl orthoformate (15.99 mL, 96 mmol) was stirred at 155° C. for 22hours. After cooling to RT, the yellow precipitate was collected byvacuum filtration and washed with hexanes to yield the titleintermediate (1.03 g, 5.67 mmol) as a yellow solid. ¹H NMR (400 MHz,DMSO-d₆) δ ppm 8.20 (s, 1H) 8.27 (d, J=2.35 Hz, 1H) 8.80 (d, J=2.25 Hz,1H) 12.68 (br. s., 1H). LC/MS (ESI⁺) m/z=182 (M+H)⁺.

Step 3: 4,7-Dichloropyrido[3,2-d]pyrimidine

To a mixture of 7-chloropyrido[3,2-d]pyrimidin-4(1H)-one (250 mg, 1.377mmol) in toluene (12 mL) were added DIPEA (0.73 mL, 4.20 mmol) andphosphorus oxychloride (0.391 mL, 4.27 mmol), and the reaction wasstirred at reflux for 1 hour. After cooling to RT, the reaction mixturewas concentrated to provide the title compound. LC/MS (ESI⁺) m/z=200(M+H)⁺.

Intermediate 10

Synthesis of 4-Chloro-7-methoxypyrido[3,2-d]pyrimidine Step 1:7-Methoxypyrido[3,2-d]pyrimidin-4(1H)-one

A microwave vial was charged with7-chloropyrido[3,2-d]pyrimidin-4(1H)-one (110 mg, 0.606 mmol), a 0.5 Msolution of sodium methoxide in methanol (3.65 mL, 1.817 mmol) andsodium methoxide (327 mg, 6.06 mmol). The vial was capped and irradiatedin a microwave reactor at 145° C. for 30 minutes. The reaction wasneutralized with saturated aqueous ammonium chloride (3 mL),concentrated, and diluted with cold water. The resulting precipitate wascollected by vacuum filtration and dried in vacuo to provide the titlecompound (107 mg, 0.604 mmol) as pink solid. ¹H NMR (400 MHz, DMSO-d₆) δppm 3.95 (s, 3H) 7.49 (d, J=2.74 Hz, 1H) 8.11 (s, 1H) 8.47 (d, J=2.74Hz, 1H). LC/MS (ESI⁺) m/z=178 (M+H)⁺.

Step 2: 4-Chloro-7-methoxypyrido[3,2-d]pyrimidine

Using an analogous reaction to that described for Intermediate 9, step3, 7-methoxypyrido[3,2-d]pyrimidin-4(1H)-one was converted to the titlecompound. LC/MS (ESI⁺) m/z=196 (M+H)⁺.

Intermediate 11

Synthesis of 4-Chloro-5-fluoro-7-methoxyquinazoline Step 1:2-Amino-6-fluoro-4-methoxybenzonitrile

Ammonia gas was bubbled through a solution of2,6-difluoro-4-methoxybenzonitrile (1.0 g, 5.91 mmol) indimethylsulfoxide (11.83 mL) for 10 minutes. The reaction was thensealed and stirred at 90° C. for 24 hours. The reaction mixture wascooled to RT and concentrated in vacuo to afford a tan residue. Theresidue was triturated with water, collected be vacuum filtration, anddried in vacuo to afford the title intermediate (0.9 g, 5.42 mmol) as awhite solid. LC/MS (ESI⁺) m/z=167 (M+H)⁺.

Step 2: 5-Fluoro-7-methoxyquinazolin-4-ol

To a mixture of formic acid (11.43 mL, 298 mmol) and sulfuric acid(0.866 mL, 16.25 mmol) was added 2-amino-6-fluoro-4-methoxybenzonitrile(0.9 g, 5.42 mmol) in portions. The reaction mixture was stirred at 100°C. for 1 hour, cooled to ambient temperature, and poured into 80 mL ofan ice-water mixture. The resulting precipitate was collected by vacuumfiltration and dried in vacuo to provide the title intermediate (0.8 g,4.12 mmol) as an off-white solid. LC/MS (ESI⁺) m/z=195 (M+H)⁺.

Step 3: 4-Chloro-5-fluoro-7-methoxyquinazoline

To a suspension of 5-fluoro-7-methoxyquinazolin-4-ol (0.125 g, 0.644mmol) in thionyl chloride (1.410 mL, 19.31 mmol) was addedN,N-dimethylformamide (0.028 mL, 0.361 mmol). The reaction was stirredat 80° C. for 6 hours and concentrated in vacuo. The residue wassuspended in saturated aqueous sodium bicarbonate and extracted withdichloromethane. The organic layer was concentrated in vacuo to generatethe title compound (0.13 g, 0.611 mmol) as a yellow solid. LC/MS (ESI⁺)m/z=213 (M+H)⁺.

Intermediate 12

Synthesis of 5-(Difluoromethyl)picolinic acid Step 1:5-Formylpicolinonitrile

A suspension of 2-bromo-5-formylpyridine (940 mg, 5.05 mmol) and copper(I) cyanide (233 μL, 7.58 mmol) in DMF (8.4 mL) was stirred at 120° C.for 1.5 hours, cooled to RT, and partitioned between water and EtOAc.The solids were removed from the aqueous layer by filtration, and thefiltrate was extracted with ethyl acetate. The combined organic layerswere washed with brine, dried over anhydrous magnesium sulfate, filteredand concentrated. The crude product was purified by silica-gelchromatography, eluting with a gradient of 40%-60% (40% ethyl acetate inheptane) in heptane, to provide the title compound (236 mg, 1.786 mmol)as white solid. LC/MS (ESI⁺) m/z=133 (M+H)⁺.

Step 2: 5-(Difluoromethyl)picolinonitrile

To a solution of 5-formylpicolinonitrile (74 mg, 0.560 mmol) in toluene(0.25 mL) was added bis(2-methoxyethyl)aminosulfur trifluoride (0.258mL, 1.400 mmol), and the reaction was stirred at RT overnight. Thereaction mixture was carefully quenched with saturated aqueous sodiumbicarbonate, diluted with water, and extracted with DCM. The organiclayer was washed with brine, dried over anhydrous magnesium sulfate,filtered, and concentrated. The crude material was purified bysilica-gel chromatography, eluting with a gradient of 40% to 60% (40%ethyl acetate/heptane) in heptane, to provide the title compound (48 mg,0.311 mmol) as white solid. LC/MS (ESI⁺) m/z=155 (M+H).

Step 3: 5-(difluoromethyl)picolinic acid

A suspension of 5-(difluoromethyl) picolinonitrile (48 mg, 0.311 mmol)in 12 N aqueous hydrochloric acid (4.3 mL, 140 mmol) was stirred at 110°C. for 1.5 hours. After cooling to ambient temperature, the reactionmixture was concentrated and treated with DIPEA (2 mL). The mixture wasconcentrated and dried in vacuo to provide the title compound inquantitative yield. LC/MS (ESI⁺) m/z=174 (M+H)⁺.

Intermediate 13

Synthesis of 5-methoxy-3-methylpyrazine-2-carboxylic acid Step 1: Methyl3-methylpyrazine-2-carboxylate

In a 2-L flask, 3-methylpyrazine-2-carboxylic acid (Matrix, 19.95 g, 144mmol) was suspended in MeOH (500 mL). The suspension was cooled in anice-water bath, and concentrated sulfuric acid (Fluka, 27.3 mL, 506mmol) was added over a time period of 5 min. The reaction mixture washeated to 80° C. for 5 h. The reaction mixture was concentrated underreduced pressure and the residue was taken up in DCM (750 mL). Theexcess acid was neutralized carefully with of aqueous NaOH (5N or 5M,200 mL). The aqueous layer was separated and extracted with DCM (250mL). The combined organic layers were combined, dried over MgSO₄ andconcentrated to afford 16.15 g of the title compound (106 mmol, 73%). MSm/z=153 [M+H]⁺. Calculated for C⁷H₈N₂O₂: 152.

Step 2: 3-(Methoxycarbonyl)-2-methylpyrazine 1-oxide

In a 1-L flask, the methyl 3-methylpyrazine-2-carboxylate (step 1, 16.08g, 106 mmol) was suspended in CHCl₃ (300 mL). 3-chlorobenzoperoxoic acid(Aldrich, 24.62 g, 143 mmol) was added. The reaction mixture was heatedto 70° C. for 16 h. The reaction mixture was quenched with saturatedNaHCO₃ (200 mL). The layers were separated, and the aqueous layer wasfurther extracted with DCM (2×100 mL). The combined organic layers weredried over MgSO₄, and the filtrate was concentrated to afford the titlecompound. MS m/z=169 [M+H]⁺. Calculated for C₇H₈N₂O₃: 168.

Step 3: Methyl 5-chloro-3-methylpyrazine-2-carboxylate

In a 1-L flask, the crude 3-(methoxycarbonyl)-2-methylpyrazine 1-oxide(step 2, 17.77 g, 106 mmol) was dissolved in DMF (300 mL). Neatphosphoryl trichloride (29.6 mL, 317 mmol) was added. The reactionmixture was heated to 100° C. After 1 h, the reaction mixture wasconcentrated to remove most of the DMF. The flask was cooled in an icewater bath, and 1 M aqueous Na₂CO₃ (300 mL) was added slowly, followedby 80% EtOAc-hexane (400 mL). The mixture was filtered through Celite.The resulting filtrate was partitioned and the aqueous phase wasextracted further with 80% EtOAc-hexane (2×250 mL). The combined organiclayers were dried over MgSO₄ and concentrated. The material was purifiedthrough silica gel using 11% EtOAc-hexane to afford the title compound(4.29 g, 23 mmol, 22%). MS m/z=187 [M+H]⁺. Calculated for C₇H₇ClN₂O₂:186. ¹H NMR in CDCl₃ δ: 8.51 (s, 1H), 4.01 (s, 3H), 2.86 (s, 3H).

Step 4: 5-Methoxy-3-methylpyrazine-2-carboxylic acid

A flask was charged with sodium (0.813 g, 35.4 mmol), purged with Argon.and placed in a room temperature water bath. Methanol (47.7 mL, 1179mmol) was added slowly. After 40 min, methyl5-chloro-3-methylpyrazine-2-carboxylate (step 3, 2.2 g, 11.79 mmol) wasadded. The vessel was sealed and heated to 45° C. for 1.5 hs. Sodiumhydroxide (1M, 12.97 mL, 12.97 mmol) was added and heating was continuedfor 1.5 hs. The reaction mixture was concentrated uncle reduced pressureand the residue was dissolved in a minimum amount of water (50 mL). Theaqueous phase was extracted with diethyl ether (15 mL), which wasdiscarded. The aqueous phase was acidified with HCl (5M, 11 mL, 55mmol). The mixture was extracted with DCM (3×60 mL). The combinedorganic extracts were dried over MgSO₄ and the filtrate was concentratedto afford the title compound (2.0 g, 100%). MS m/z=169 [M+H]⁺.Calculated for C₇H₈N₂O₃: 168. ¹H NMR in CDCl₃ δ: 10.70 (br, 1H), 7.98(s, 1H), 4.00 (s, 3H), 2.91 (s, 3H).

Intermediate 14

Synthesis of 3-methyl-5-(2,2,2-trifluoroethoxy)pyrazine-2-carboxylicacid

The title compound was synthesized according to Intermediate 13, using2,2,2,-trifluoroethanol (Aldrich) in Step 4. MS m/z=237 (M+H)⁺.

Intermediate 15

Synthesis of 5-chloro-3-methoxypicolinic acid

In a 1-L flask, 5-chloro-3-nitropicolinonitrile (Oakwood, 6.67 g, 36.3mmol) was dissolved in MeOH (185 mL). The solution was cooled to 0° C.,and sodium hydroxide (3M, 36.3 mL, 109 mmol) was added. The reactionmixture was warmed to room temperature and stirred overnight. Thereaction was concentrated under reduced pressure and the residue wastaken up in absolute ethanol (100 mL). NaOH (5M, 3 equiv, 109 mmol, 22mL) was added, and the reaction mixture was heated to 100° C. for 1 h.The reaction mixture was concentrated under reduced pressure and theresidue was taken up in water (100 mL). The aqueous layer was extractedwith diethyl ether (30 mL), which was discarded. The aqueous phase wasacidified with HCl (5M, 55 mL), saturated with NaCl, and extracted withEtOAc (5×75 mL). The combined organic extracts were dried over MgSO₄ andthe filtrate was concentrated under reduced pressure. The resultingsolid was triturated with diethyl ether to afford the title compound(5.63 g, 30 mmol, 83%). MS m/z=188 [M+H]⁺. Calculated for C₇H₆ClNO₃:187. ¹H NMR in CDCl₃ δ: 8.18 (d, 1H, J=1.8), 7.49 (d, 1H, J=1.8), 4.03(s, 3H).

Intermediate 16

Synthesis of 5-cyano-3-methoxypicolinic acid Step 1: Methyl5-chloro-3-methoxypicolinate

In a 350-mL resealable vessel, 5-chloro-3-methoxypicolinic acid(intermediate 14, 7.51 g, 40.0 mmol) was dissolved in MeOH (120 mL). Thesolution was cooled to 0° C., and concentrated sulfuric acid (7.57 mL,140 mmol) was added. The vessel was sealed and heated to 95° C. for 1.5h. The reaction mixture was cooled to 0° C., and quenched with Na₂CO₃(1M, 140 mL). The reaction mixture was concentrated under reducedpressure and the residue was extracted with EtOAc (3×100 mL). Thecombined organics extracts were dried over MgSO₄ and the filtrate wasconcentrated under reduced pressure. The residue was purified by silicagel chromatography (gradient 20%-33% EtOAc/hexane) to afford the titlecompound as a yellow solid (5.59 g, 27.7 mmol, 67%). MS m/z=202 [M+H]⁺.Calculated for C₈H₈ClNO₃: 201. ¹H NMR in CDCl₃ δ: 8.24 (d, 1H, J=1.9),7.37 (d, 1H, J=1.9), 3.97 (s, 3H), 3.94 (s, 3H).

Step 2: Methyl 5-cyano-3-methoxypicolinate

In a 350-mL resealable vessel, Pd₂dba₃ (1.487 g, 1.623 mmol),dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine (1.444 g,3.52 mmol), dicyanozinc (3.18 g, 27.1 mmol), and methyl5-chloro-3-methoxypicolinate (step 1, 5.455 g, 27.1 mmol) were taken upin DMF (80 mL). The reaction mixture was purged with Argon andsubsequently heated to 120° C. for 2 h. Upon cooling, the reactionmixture was concentrated under reduced pressure. The residue wasfiltered through Celite, and the filter cake was rinsed with 1%MeOH/DCM. The filtrate was concentrated under reduced pressure and theresidue was purified by silica gel chromatography (33%-40% EtOAc/hexane)to afford the title compound as a white solid (4.51 g, 23.5 mmol, 87%).MS m/z=193 [M+H]⁺. Calculated for C₉H₈N₂O₃: 192. ¹H NMR in CDCl₃ δ: 8.51(d, 1H, J=1.6), 7.55 (d, 1H, J=1.6), 4.00 (s, 3H), 3.97 (s, 3H).

Step 3: 5-Cyano-3-methoxypicolinic acid

In a 1-L flask, the methyl 5-cyano-3-methoxypicolinate (step 2, 4.51 g,23.5 mmol) was taken up in THF (74 mL). The suspension was cooled to 0°C., and sodium hydroxide (1M, 24.64 mL, 24.64 mmol) was added. After 1h, the reaction was concentrated under reduced pressure. The residue wastaken up in 100 mL of water, and the aqueous phase was extracted withdiethyl ether (50 mL), which was discarded. The aqueous phase wasacidified with HCl (5M, 5.16 mL, 25.8 mmol). The aqueous phase wasextracted with DCM (11×150 mL). The combined organic extracts were driedover MgSO₄ and the filtrate was concentrated under reduced pressure toafford the title compound as a white solid. MS m/z=179 [M+H]⁺.Calculated for C₈H₆N₂O₃: 178. ¹H NMR in CDCl₃ δ: 8.48 (d, 1H, J=1.6),7.71 (d, 1H, J=1.6), 4.08 (s, 3H).

Intermediate 17

Synthesis of 5-cyano-3-methylpicolinic acid

To a solution of tert-butyl 5-cyano-3-methylpicolinate (synthesizedaccording to procedure described in WO2012095521; 4.18 g, 19.15 mmol) indichloromethane (96 ml) was added TFA (Aldrich, 148 ml, 1915 mmol). Thereaction mixture was stirred at room temperature for 2 hrs. The reactionmixture was concentrated under reduced pressure and the residue wastriturated with EtOAc. The yellow slurry was concentrated under reducedpressure. The residue was triturated with 30 mL of methyl tert-butylether (30 mL) and hexanes (50 mL) to yield 5-cyano-3-methylpicolinicacid (2.91 g, 17.95 mmol, 94% yield) as yellow solid. MS m/z=163.2[M+H]⁺. Calculated for C8H6N2O2: 162.0

Intermediate 18

Step 1:3-Chloro-5-fluoro-6-methoxy-6,7-dihydro-1,7-naphthyridin-8(5H)-one

A pressure bottle was charged with 3-chloro-1,7-naphthyridin-8(7H)-one(Anichem, 15 g, 83 mmol), MeOH (34 ml), acetonitrile (173 ml) and1-(chloromethyl)-4-fluoro-1,4-diazabicyclo[2.2.2]octane-1,4-diiumtetrafluoroborate (Aldrich, 30.9 g, 87 mmol). The mixture was heated to45-50° C. After 6 hs additional1-(chloromethyl)-4-fluoro-1,4-diazabicyclo[2.2.2]octane-1,4-diiumtetrafluoroborate (2.5 g) was added and heating was continued overnight.Water and EtOAc were added to the cooled reaction mixture and the layerswere separated. The aqueous layer was extracted with EtOAc, and thecombined organic layers were dried over MgSO₄. The filtrate wasconcentrated under reduced pressure and the residue was triturated withEtOAc. The solid was filtered off and the title compound (15.34 g, 66.5mmol, 80% yield) was isolated as a white solid. MS m/z=231 [M+H]⁺.Calculated for C₉H₈ClFN₂O₂: 230.0

Step 2:5-Fluoro-6-methoxy-8-oxo-5,6,7,8-tetrahydro-1,7-naphthyridine-3-carbonitrile

A pressure bottle was charged with Pd(dba)₃ (Strem, 1.032 g, 1.127mmol), 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl (Strem 1.157 g,2.82 mmol), zinc cyanide (Alfa Aesar, 2.482 g, 21.14 mmol),3-chloro-5-fluoro-6-methoxy-6,7-dihydro-1,7-naphthyridin-8(5H)-one (step1, 3.25 g, 14.09 mmol) and DMF (70 ml). The bottle was purged with Argonand the reaction mixture was heated to 110° C. for 1 h. The crudereaction mixture was filtered through a pad of Celite and the filtercakewas washed with MeOH. The combined filtrates were concentrated underreduced pressure. The residue was triturated with DCM. The solid wasfiltered off and washed with DCM. The title compound (2.27 g, 10.26mmol, 72.8% yield) was obtained as an off white solid. MS m/z=222[M+H]⁺. Calculated for C₁₀H₈FN₃O₂: 221.1

Step 3: 8-Chloro-5-fluoro-1,7-naphthyridine-3-carbonitrile

A pressure bottle was charged with5-fluoro-6-methoxy-8-oxo-5,6,7,8-tetrahydro-1,7-naphthyridine-3-carbonitrile(step 3, 2.27 g, 10.26 mmol), acetonitrile (41 ml) and phosphorusoxychloride (Aldrich, 3.35 ml, 35.9 mmol). The bottle was sealed and thereaction mixture was heated to 75° C. overnight. The reaction mixturewas concentrated and the crude material was purified by silica gelchromatography (gradient 0-20% (10 MeOH in DCM)/DCM to afford the titlecompound (1.2 g, 5.78 mmol, 56.3% yield) as a white solid. MS m/z=208[M+H]⁺. Calculated for C₉H₃ClFN₃: 207.0

Intermediate 19 (Method R)

Synthesis of 5-chloropicolinamide

A 500-mL RBF was charged with 5-chloro-2-pyridinecarboxylic acid (ArkPharm, 10.00 g, 63.5 mmol) and thionyl chloride (Aldrich, 100 ml, 1371mmol). A catalytic amount of DMF (0.2 ml) was added and the reactionmixture was heated to 80° C. under Argon atmosphere for 4 hours. Thereaction mixture was cooled to RT and concentrated under reducedpressure. The residue was diluted with DCM (100 ml) and added slowly toa stirred solution of ammonium hydroxide (131 ml, 3364 mmol) at 0° C.After completed addition, the reaction mixture was allowed to stir anadditional 10 min. The reaction mixture was concentrated under reducedpressure and the precipitate was filtered off. The solid was washed withwater and dried to give the title compound (8.686 g, 55.5 mmol, 87%yield) as an off-white solid. MS m/z=157 [M+H]⁺. Calculated forC₆H₅ClN₂O: 156

Intermediate 20

Synthesis of 5-cyanopicolinamide

The title compound was synthesized according to Method R starting from5-cyanopicolinic acid (Aldrich). MS m/z=147.9 [M+H]⁺. Calculated forC₇H₅N₃O: 147

Intermediate 21

Synthesis of 5-chloro-3-methylpicolinamide

The title compound was synthesized according to Method R starting from5-chloro-3-methylpicolinic acid (intermediate 17). MS m/z=171.1 [M+H]⁺.Calculated for C₇H₇ClN₂O: 170

Intermediate 22

Synthesis of 3-chloro-5-cyanopicolinamide

The title compound was synthesized according to Method R starting from3-chloro-5-cyanopicolinic acid (Bionet Research). MS m/z=181.9 [M+H]⁺.Calculated for C₇H₄ClN₃O: 181

Intermediate 23

Synthesis of 3-chloro-5-(trifluoromethyl)picolinamide

The title compound was synthesized according to Method R starting from3-chloro-5-(trifluoromethyl)picolinic acid (Ark Pharm). MS m/z=224.9[M+H]⁺. Calculated for C₇H₄ClF₃N₂O: 224

Intermediate 24

Synthesis of 4-chloro-1-(difluoromethyl)-1H-pyrazole-3-carboxamide

The title compound was prepared according to Method R starting from4-chloro-1-(difluoromethyl)-1H-pyrazole-3-carboxylic acid (WO201169934).MS m/z=196 (M+H).

Intermediate 25

Synthesis of 3-chloro-5-methoxypicolinic acid Step 1: methyl3-chloro-5-methoxypicolinate

In a 1-L flask, methyl 3-chloro-5-hydroxypicolinate (Afferchem, 25.00 g,133 mmol) and cesium carbonate (87 g, 267 mmol) were suspended in DMF(200 mL) and iodomethane (41.7 mL, 666 mmol) was added dropwise. Awater-cooled condenser was attached, and the reaction vessel was heatedin a 55° C. oil bath. After 3 h the reaction was concentrated underreduced pressure. The residue was taken up in 1.2 L of 80% EtOAc-hexaneand 500 mL brine. The mixture was filtered through Celite. The filtratewas transferred into a separation funnel. The organic layer wasseparated, washed with brine (100 mL), dried over MgSO₄ and concentratedunder reduced pressure. The residue was purified by silica gelchromatography eluting with 30% to 40% EtOAc-hexane, affording the titlecompound (19.1 g) as a tan solid. MS m/z=202 (M+H).

Step 2: 3-chloro-5-methoxypicolinic acid

Using an analogous reaction to that described for Intermediate 5, step 2methyl 3-chloro-5-methoxypicolinate was converted to the title compound.MS m/z=188 (M+H).

Intermediate 26

Synthesis of 3-chloro-5-methoxypicolinamide

The title compound was synthesized according to procedure R startingfrom 3-chloro-5-methoxypicolinic acid (intermediate 25). MS m/z=187(M+H).

Intermediate 27

Synthesis of 3,5-dichloropicolinamide

The title compound was synthesized according to Method R, starting from3,5-dichloropyridine-2-carboxylic acid (Matrix Scientific). MS m/z=190.9[M+H]⁺. Calculated for C₆H₄Cl₂N₂O: 189.

Intermediate 28

Synthesis of 5-methoxypicolinamide Step 1: Sodium-5-methoxypicolinate

A microwave vial was charged with methyl 5-methoxypicolinate (9.700 g,58.0 mmol, synthesized according to Tetrahedron Letters 2011, 52,122-124) and sodium hydroxide solution (10 N; 58.0 ml, 580 mmol). Thereaction mixture was stirred and heated in a CEM Voyager microwave(Large-Scale Unit) at 120° C. for 11 min (150 watts, Powermax featureon). Subsequently, the reaction mixture was allowed to stir for 10minutes at ambient temperature. The precipitate was collected byfiltration and the solid was rinsed with hexanes. The solid was dried toobtain sodium 5-methoxypicolinate (9.83 g, 56.1 mmol, 97% yield) as alight-yellow solid. MS m/z=175.9 [M+H]⁺. Calculated for C₇H₆NNaO₃: 175.¹H NMR (400 MHz, MeOH) d ppm 8.23 (d, J=2.93 Hz, 1H) 8.06 (d, J=8.61 Hz,1H) 7.39 (dd, J=8.80, 2.93 Hz, 1H) 3.91 (s, 3H)

Step 2: 5-methoxypicolinamide

The title compound was synthesized according to Method R, starting fromsodium-5-methoxypicolinate. MS m/z=153 [M+H]⁺. Calculated for C₇H₈N₂O₂:152.

Intermediate 29

Step-1: Synthesis of 6-chloro-5-methylpyridine-3-amine

Iron (Fe) powder (9.75 g, 0.174 mol, Sigma-Aldrich) was added inportions over a period of 2 h to a stirred solution of2-chloro-3-methyl-5-nitropyridine (10 g, 0.058 mol, Combi-blocks) inacetic acid/water (29 mL: 88 mL). After 3 h, the reaction mixture wasfiltered through celite and the filter cake was washed with ethylacetate. The organic layer was separated and the aqueous layer wasextracted with EtOAc. The combined organic layers were washed withaqueous sodium bicarbonate, brine and dried over Na2SO4. The solvent wasremoved under reduced pressure to yield6-chloro-5-methylpyridine-3-amine as a brown solid (8.0 g; 97%). MSm/z=142.03 [M+H]⁺.

¹H-NMR (300 MHz, DMSO-d6): δ 7.54 (d, J=30 Hz, 1H), 6.91-6.90 (dd, J=0.6Hz & 2.7 Hz, 1H), 5.39 (s, 2H), 2.17 (s, 3H)

Step 2: Synthesis of 6-chloro-5-methylpyridine-3-ylacetate

In a 100 mL R.B. flask, Boron trifluoride diethyl etherate (1.8 mL,0.0143 mol, Sigma Aldrich) was added drop wise to a cooled mixture (−15°C.) of 6-chloro-5-methylpyridine-3-amine (1.0 g, 0.0070 mol) in DME (7.5mL) and dichloromethane (2.5 mL). Then tert-butyl nitrite (0.85 g,0.0082 mol, Sigma-Aldrich) was added drop wise and the reaction mixturewas stirred at −10° C. for 25 min. The reaction mixture was allowed towarm to 0° C. and stirred for additional 20 min. The reaction mixturewas diluted with pentane (50 mL) and the tetrafluoroborate diazoniumsalt was collected by filtration. The salt was dissolved in aceticanhydride (10 mL) and heated at 95° C. for 2 h. The reaction mixture wascooled to ambient temperature and then partitioned between ethyl acetate(50 mL) and sat.aq.sodium bicarbonate solution (100 mL). The aqueoussolution was separated and extracted with ethyl acetate (2×100 mL). Thecombined organic layers were washed with brine, dried over anhydroussodium sulfate, filtered and concentrated to afford a brown oil. Thisoil was purified by column chromatography on silica gel, eluting with 5%ethyl acetate in petroleum ether to give 6-chloro-5-methylpyridine-3-ylacetate as pale yellow oil (780 mg, 62%). MS m/z=185.02 [M+H]

¹H-NMR (300 MHz, DMSO-d₆): δ 8.13 (d, J=2.4 Hz, 1H), 7.72 (d, J=2.7 Hz1H), 2.34 (s, 3H), 2.30 (s, 3H)

Step-3: Synthesis of 6-chloro-5-methylpyridine-3-ol

Potassium carbonate (1.10 g, 0.0081 mol) was added to a stirred solutionof 6-chloro-5-methylpyridine-3-yl acetate (750 mg, 0.004 mol) in MeOH(15 mL) at RT. The reaction mixture was stirred for 1 h at ambienttemperature. The reaction mixture was concentrated under reducedpressure and the residue was diluted with minimum amounts of water andneutralized with 1N HCl (15 mL). After neutralization, the solution wasextracted with ethyl acetate (2×100 mL). The combined organic layerswere washed with brine, dried over anhydrous sodium sulfate andconcentrated to give 6-chloro-5-methylpyridine-3-ol as a off white solid(500 mg, 89%). MS m/z=143.01 [M+H]+.

¹H-NMR (300 MHz, DMSO-d₆): δ 10.09 (s, 1H), 7.76 (d, J=3 Hz, 1H), 7.18(d, J=3.6 Hz, 1H), 2.24 (s, 3H).

Step 4: Synthesis of 2-chloro-5-((4-methoxybenzyl) oxy)-3-methylpyridine

A mixture of 6-chloro-5-methylpyridin-3-ol (250 mg, 0.0017 mol),1-(chloromethyl)-4-methoxybenzene (0.328 g, 0.0020 mol, Sigma Aldrich),and potassium carbonate (0.482 g, 0.0034 mol) in DMF (5 mL) was allowedto stir for 3 h at 60° C. After completion of the reaction, reactionmixture was cooled to ambient temperature and poured into ice cold water(25 mL). The obtained solid was filtered, washed with water (2×10 mL)and dried to obtain 2-chloro-5-((4-methoxybenzyl)oxy)-3-methylpyridineas an off white solid (400 mg, 87%).

MS m/z=263.9 [M+H]+.

¹H-NMR (300 MHz, CDCl₃): δ 7.96 (d, J=2.7 Hz, 1H), 7.34 (d, J=8.7 Hz,2H), 7.15 (d, J=3 Hz, 1H), 6.94-6.89 (m, 2H), 4.99 (s, 2H), 3.81 (s,3H), 2.33 (s, 3H).

Step 5: Synthesis of 5-((4-methoxybenzyl)oxy)-3-methyl-2-vinylpyridine

A 25 mL sealable tube was charged with a mixture of2-chloro-5-(difluoromethoxy)-3-methylpyridine (330 mg, 0.0012 mmol),toluene (10 mL), and tributyl(vinyl)stannane (447 mg, 0.0015 mmol). Thereaction mixture was purged with Argon gas for 10 min. Then Pd(PPh₃)₄(144 mg, 0.00018 mol, Alfa-Aesar) was added and the reaction mixture wasallowed to stir for 16 h at 100° C. The reaction mixture was cooled toambient temperature and filtered through celite. The filter cake waswashed with ethyl acetate and concentrated to get a crude residue. Theresidue was purified by column chromatography using silica and elutingwith 5-10% ethyl acetate in petroleum ether to give5-((4-methoxybenzyl)oxy)-3-methyl-2-vinylpyridine as an off white solid(250 mg, 65%). MS m/z=256.1 [M+H]⁺.

¹H-NMR (300 MHz, CDCl₃): δ 8.20 (d, J=2.7 Hz, 1H), 7.37-7.33 (m, 2H),7.02 (d, J=2.7 Hz, 1H), 6.94-6.87 (m, 3H), 6.21 (dd, J=1.8 Hz & 16.8 Hz,1H), 5.39 (dd, J=2.1 Hz & 10.5 Hz, 1H), 5.01 (s, 2H), 3.81 (s, 3H), 2.33(s, 3H).

Step 6: Synthesis of 5-methyl-6-vinylpyridin-3-ol

Trifluoroacetic acid (1.25 mL, 5 times) was added to a stirred solutionof 54(4-methoxybenzyl)oxy)-3-methyl-2-vinylpyridine (250 mg, 0.00098mmol) in anisole (0.5 mL). The reaction mixture was stirred for 2 h atambient temperature. After completion of the reaction, the reactionmixture was concentrated and quenched with saturated NaHCO3 solution (2ml). The reaction mixture was extracted with ethyl acetate (2×10 mL) andthe combined organic layers were washed with brine, dried over anhydroussodium sulfate and concentrated under reduced pressure. The cruderesidue was triturated with pentane to afford5-methyl-6-vinylpyridin-3-ol as an off white solid (100 mg, 76%). MSm/z=136.15 [M+H]⁺.

¹H-NMR (400 MHz, CDCl₃): δ 9.86 (s, 1H), 7.96 (d, J=2.8 Hz, 1H),6.94-6.86 (m, 2H), 6.07 (dd, J=2.4 Hz & 16.8 Hz, 1H), 5.26 (dd, J=2.8 Hz& 10.4 Hz, 1H), 2.25 (s, 3H).

Step 7: Synthesis of 5-(but-2-yn-1-yloxy)-3-methyl-2-vinylpyridine

A reaction mixture of 5-methyl-6-vinylpyridin-3-ol (100 mg, 0.00074mmol), sodium 1-bromobut-2-yne (118 mg, 0.00088 mol, Alfa-Aesar) andcesium carbonate (361 mg, 0.0011 mol) in DMF (2 mL) was stirred for 2 hat 80° C. After completion of the reaction, reaction mixture was cooledto ambient temperature, poured into ice-cold water (10 mL) and extractedwith ethyl acetate (3×10 mL). The combined organic layers were washedwith brine, dried over sodium sulfate and concentrated under reducedpressure. The crude residue was purified by column chromatography usingsilica gel and eluting with 0-10% ethyl acetate in petroleum ether togive 5-(but-2-yn-1-yloxy)-3-methyl-2-vinylpyridine as an off white solid(85 mg, 61.5%). MS m/z=188.3 [M+H]⁺.

¹H-NMR (400 MHz, CDCl₃): δ 8.21 (d, J=2.8 Hz, 1H), 7.03 (d, J=2.4 Hz,1H), 6.96-6.89 (m, 1H), 6.22 (dd, J=2.4 Hz & 17.2 Hz, 1H), 5.40 (dd, J=2Hz & 10.8 Hz, 1H), 4.68-4.67 (m, 2H), 2.35 (s, 3H), 1.85 (t, J=2.4 Hz,3H).

Step 8: Synthesis of 5-(but-2-yn-1-yloxy)-3-methylpicolinaldehyde

OsO₄ (2.5 wt. % sol. in tert-Butanol) (0.86 mL, 0.0027 mol) was added toa stirred solution of 5-(but-2-yn-1-yloxy)-3-methyl-2-vinylpyridine (5.1g, 0.027 mol) in acetone/water (100:100 mL) at 0° C. The reactionmixture was allowed to stir for 30 min at ambient temperature. ThenNaIO₄ (23.2 g, 0.108 mol) was added and the reaction mixture was allowedto stir for additional 4 h at ambient temperature. The reaction mixturewas diluted with ice cold water (200 mL) and extracted with EtOAc (3×200mL). The combined organic layers were washed with brine, dried overNa₂SO₄ and concentrated under reduced pressure. The crude residue waspurified by flash column chromatography on silica gel, eluting with5-10% EtOAc in pet ether to give5-(but-2-yn-1-yloxy)-3-methylpicolinaldehyde as an off white solid (3.6g, 69.9%). MS m/z=189.9 [M+H]⁺.

¹H-NMR (400 MHz, CDCl₃): δ 10.10 (s, 1H), 8.37 (d, J=2.8 Hz, 1H), 7.13(d, J=2.8 Hz, 1H), 4.77 (d, J=2.4 Hz, 2H), 2.67 (s, 3H), 1.86 (t, J=2Hz, 3H).

Step 9: Synthesis of 5-(but-2-yn-1-yloxy)-3-methylpicolinic acid

A stirred solution of 5-(but-2-yn-1-yloxy)-3-methylpicolinaldehyde (3.6g, 0.019 mol) in water (216 mL)/acetone (36 mL) was treated withsulphamic acid (2.5 g, 0.025 mol) and 85% sodium chlorite (2.65 g, 0.029mol). The reaction mixture was allowed to stir for 2 h at ambienttemperature. The reaction mixture was extracted with ethyl acetate(2×100 ml). The combined organic layer were washed with brine, driedover Na₂SO₄ and concentrated under reduced pressure. The crude residuewas triturated with n-pentane to get5-(but-2-yn-1-yloxy)-3-methylpicolinaldehyde as an off white solid (3.2g, 82%). MS m/z=206.3 [M+H]⁺.

¹H-NMR (400 MHz, CD3OD): δ 8.16 (d, J=2.8 Hz, 1H), 7.38 (d, J=2.4 Hz,1H), 4.84-4.82 (m, 2H), 2.63 (s, 3H), 1.83 (t, J=2 Hz, 3H).

Intermediate 30

Step 1: Synthesis of 2-chloro-3-methyl-5-(2,2,2-trifluoroethoxy)pyridine

Tert-butyl nitrite (1.60 g, 0.0156 mol, Sigma-Aldrich) was added dropwise to a stirred solution of 6-chloro-5-methylpyridine-3-amine (2.0 g,0.0140 mol) in trifluoroethanol (10.05 g, 0.100 mol) and TFA (2.42 g,0.0212 mol) at ambient temperature, followed by slow addition ofpotassium carbonate (4.40 g). The reaction mixture was stirred atambient temperature for 1 h. The reaction mixture was poured intoice-cold water and extracted with ethyl acetate (2×300 mL). The combinedorganic layer were washed with brine, dried over sodium sulfate andconcentrated. The crude residue was purified by silica gel columnchromatography, eluting with 5% ethyl acetate in petroleum ether to give2-chloro-3-methyl-5-(2,2,2-trifluoroethoxy)pyridine (1.30 g, 41.13%yield) as a reddish oil. MS m/z=225.02 [M+H]

¹H-NMR (400 MHz, CDCl₃): δ 7.96 (d, J=3.2 Hz, 1H), 7.19 (d, J=2.8 Hz,1H), 7.87-4.41-4.35 (m, 2H), 2.37 (s, 3H),

Step 2: Synthesis of 3-methyl-5-(2,2,2-trifluoroethoxy)-2-vinylpyridine

Using an analogous reaction to that described for Intermediate 29, step5 2-chloro-3-methyl-5-(2,2,2-trifluoroethoxy)pyridine was converted to3-methyl-5-(2,2,2-trifluoroethoxy)-2-vinylpyridine. MS m/z=217.07 [M+H]

¹H-NMR (400 MHz, CDCl₃): δ 8.18 (d, J=2.8 Hz, 1H), 7.03 (d, 3.2 Hz, 1H),6.96-6.89 (m, 2H), 6.26-6.21 (dd, J=2 Hz, 16.8 Hz, 1H), 5.45-5.42 (dd,J=2 Hz, 10.8 Hz, 1H), 4.42-4.36 (m, 2H), 2.36 (s, 3H).

Step 3: Synthesis of 3-methyl-5-(2,2,2-trifluoroethoxy) picolinaldehyde

Using an analogous reaction to that described for Intermediate 29, step8 3-methyl-5-(2,2,2-trifluoroethoxy)-2-vinylpyridine was converted to3-methyl-5-(2,2,2-trifluoroethoxy) picolinaldehyde. MS m/z=219.05 [M+H]⁺

¹H-NMR (400 MHz, CDCl₃): δ 10.11 (s, 1H), 8.36 (dd, J=2.4 Hz, 1H), 7.11(dd, J=2.8 Hz, 1H), 4.51-4.46 (m, 2H), 2.67 (s, 3H).

Step 4: Synthesis of 3-methyl-5-(2,2,2-trifluoroethoxy) picolinic acid

Using an analogous reaction to that described for Intermediate 34, step9 3-methyl-5-(2,2,2-trifluoroethoxy) picolinaldehyde was converted to3-methyl-5-(2,2,2-trifluoroethoxy) picolinic acid. MS m/z=235.05 [M+H]⁺

¹H-NMR (400 MHz, CD₃OD): δ 8.23 (d, J=2.4 Hz, 1H), 7.46 (d, J=2.4 Hz,1H), 4.77-4.71 (m, 2H), 2.64 (s, 3H).

Intermediate 31

Synthesis of 3,5-dimethoxypyrazine-2-carboxylic acid Step 1:3,5-dichloropyrazine-2-carboxylic acid

To a solution of lithium diisopropylamide (2.0 Mheptane/tetrahydrofuran/ethylbenzene, 11.10 mL, 22.20 mmol) in THF (75mL) at −78° C. was added a solution of 2,6-dichloropyrazine (1.44 g,9.67 mmol) in THF (20 mL) at room temperature over 20 min. The reactionmixture was stirred at −78° C. for 1.5 h and added via cannula to a3-neck flask containing dry ice at −78° C. The reaction mixture waswarmed from −78° C. to room temperature over 21 h and quenched with 5 MHCl. The mixture was partitioned between brine and EtOAc. The aqueousphase was acidified to pH 3.5 with 5 M HCl. The aqueous phase wasextracted with EtOAc (6×) and the combined organic extracts were washedwith brine (1×), dried over MgSO₄, filtered, and concentrated.Purification by flash column chromatography on silica gel (5% to 10%MeOH in DCM) gave 3,5-dichloropyrazine-2-carboxylic acid (0.408 g, 2.11mmol, 22% yield) as a light brown solid. LC/MS (ESI⁺) m/z=193.0 (M+H)⁺.

Step 2: methyl 3,5-dichloropyrazine-2-carboxylate

To a solution of 3,5-dichloropyrazine-2-carboxylic acid (0.304 g, 1.58mmol) in MeOH (5 mL) and diethyl ether (5 mL) at room temperature wasadded (trimethylsilyl)diazomethane (2.0 M solution in hexanes, 4.00 mL,8.00 mmol). The reaction mixture was stirred at RT for 30 min andconcentrated. Purification by flash column chromatography on silica gel(5% to 20% EtOAc in hexanes) gave methyl3,5-dichloropyrazine-2-carboxylate (0.312 g, 1.51 mmol, 96% yield) as awhite solid. LC/MS (ESI⁺) m/z=207.0 (M+H)⁺.

Step 3: ethyl 3,5-dimethoxypyrazine-2-carboxylate

To a solution of methyl 3,5-dichloropyrazine-2-carboxylate (0.312 g,1.51 mmol) in THF (4.5 mL) at RT was added sodium hydride (60% wt.dispersion, 0.199 g, 4.98 mmol) and methanol (0.200 mL, 4.94 mmol). Thereaction mixture was stirred at RT for 30 min, diluted with EtOAc, andquenched with saturated NH₄Cl. The reaction mixture was partitionedbetween brine and EtOAc. The aqueous phase was extracted with EtOAc (3×)and the combined organic extracts were washed with brine (1×), driedover MgSO₄, filtered, and concentrated. Purification by flash columnchromatography on silica gel (10% to 50% EtOAc in hexanes) gave ethyl3,5-dimethoxypyrazine-2-carboxylate (0.314 g, 1.48 mmol, 98% yield) asan off white solid. LC/MS (ESI⁺) m/z=199.1 (M+H)⁺.

Step 4: 3,5-dimethoxypyrazine-2-carboxylic acid

To a solution of ethyl 3,5-dimethoxypyrazine-2-carboxylate (0.314 g,1.48 mmol) in MeOH (5 mL) at room temperature was added potassiumhydroxide (0.135 g, 2.41 mmol). The reaction mixture was stirred at RTfor 17 h, quenched with 5 M HCl (0.48 mL), and diluted with EtOAc. Thesolid was removed by filtration and the filtrate was concentrated.Purification by flash column chromatography on silica gel (10% MeOH inDCM) gave 3,5-dimethoxypyrazine-2-carboxylic acid (0.261 g, 1.42 mmol,96% yield) as a white solid. LC/MS (ESI⁺) m/z=185.1 (M+H)⁺.

Intermediate 32

Synthesis of 5-chloro-3-methylpyrazine-2-carboxylic acid

A solution of methyl 5-chloro-3-methylpyrazine-2-carboxylate (0.117 g,0.627 mmol) (Step 3 of Intermediate 24) and sodium hydroxide 5N (0.150ml, 0.752 mmol) in dioxane (5 mL) was stirred at room temperature for 30minutes. The reaction mixture was acidified with 2N HCl to pH 4 andextracted with EtOAc (2×). The combined organic extracts were dried overNa₂SO₄ and the filtrate was concentrated to afford the title compound(91.0 mg, 84%). MS m/z=172.9 (M+H)⁺.

Intermediate 33 Method S

Synthesis of 5-(but-2-yn-1-yloxy)picolinic acid Step 1: Methyl5-(but-2-yn-1-yloxy)picolinate

A solution of methyl 5-hydroxypyridine-2-carboxylate (1.5 g, 9.8 mmol,Molbridge) in THF (39 ml) under argon was cooled to 0° C. and2-butyn-1-ol (1.5 ml, 20 mmol, Aldrich), triphenyl phosphine (2.95 g,11.2 mmol, Aldrich) and diisopropyl azodicarboxylate (2.2 ml, 11.2 mmol,Aldrich) were added consecutively. The reaction mixture was stirred atRT for 2 h. Additional diisopropyl azodicarboxylate (1 ml) was added andthe reaction mixture was stirred at RT for another 1 h. The reactionmixture was diluted with CH₂Cl₂ and washed with saturated NaHCO₃solution; the aqueous layer was back-extracted with CH₂Cl₂. The combinedorganic extracts were dried over MgSO₄ and concentrated in vacuo.Purification by silica gel chromatography (0% to 50% EtOAc/Hexanes)afforded the title compound as a light tan solid. MS m/z=206.0 [M+H]⁺.

Step 2: 5-(But-2-yn-1-yloxy)picolinic acid

Using an analogous reaction to that described for Intermediate 5, step 2methyl 5-(but-2-yn-1-yloxy)picolinate was converted to5-(But-2-yn-1-yloxy)picolinic acid MS m/z=192.1 [M+H]+.

Intermediate 34

Synthesis of 5-(prop-2-yn-1-yloxy)picolinic acid

The title compound was synthesized analogously according to Method Sstarting from propargyl alcohol (Aldrich). MS m/z=178.1 [M+H]+.

Intermediate 35

Synthesis of 5-((3-cyclopropylprop-2-yn-1-yl)oxy)picolinic acid Step 1:3-Cyclopropylprop-2-yn-1-ol

To a solution of cyclopropylacetylene (0.833 mL, 9.83 mmol, Aldrich) inTHF (20 mL) at −78° C. under N₂ was added butyllithium (6.15 mL, 9.83mmol, Aldrich) dropwise. After completed addition, the mixture wasstirred at −78° C. for 30 min, followed by slow addition of a solutionof paraformaldehyde powder (600 mg, 9.83 mmol, Aldrich) in THF (7 mL).The reaction mixture was then stirred at −78° C. for 2 h and allowed towarm up to room temperature overnight. The reaction mixture was quenchedwith saturated ammonium chloride (20 mL) at 0° C. The mixture was thenextracted with diethyl ether (2×20 mL). The combined organic extractswere dried over MgSO₄ and concentrated to a volume of approximately 3mL. The mixture was then purified by silica gel flash columnchromatography, (0%-50% diethyl ether/pentane) to give 760 mg of thetitle compound as a colorless liquid containing diethyl ether, which wasused in the next step. ¹H NMR (MeOH) δ: 4.13 (d, J=2.0 Hz, 2H),1.26-1.30 (m, 1H), 0.74-0.83 (m, 2H), 0.59-0.67 (m, 2H).

Step 2: 5-((3-Cyclopropylprop-2-yn-1-yl)oxy)picolinic acid

The title compound was synthesized analogously according to Method KSstarting from methyl 5-hydroxypicolinate (Molbridge) and3-cyclopropylprop-2-yn-1-ol. MS m/z: 218 (M+H).

Intermediate 36

Synthesis of 5-(Oxazol-2-ylmethoxy)picolinic acid

The title compound was synthesized analogously according to Method Sstarting from methyl 5-hydroxypicolinate (Molbridge) andoxazol-2-ylmethanol (AstaTech). MS m/z=237.9 [M+H]⁺. Calculated forC₉H₇N₃O₃S. ¹H NMR (400 MHz, DMSO-d₆) δ ppm 5.59 (s, 2H) 7.86 (d, J=1.96Hz, 1H) 8.45 (d, J=1.17 Hz, 1H) 8.83 (d, J=1.37 Hz, 1H) 9.14 (d, J=1.96Hz, 1H)

Intermediate 37

Synthesis of 5-(Thiazol-2-ylmethoxy)picolinic acid

The title compound was synthesized according to the above method Sstarting from 1,3-thiazol-2-ylmethanol (Maybridge Chemical Co., Ltd.).MS m/z=236.9 [M+H]⁺. Calculated for C₁₀H₈N₂O₃S: 293.084.

Intermediate 38

Synthesis of 5-((4-hydroxy-4-methylpent-2-yn-1-yl)oxy)-3-methylpicolinicacid Step 1: 5-hydroxy-3-methylpicolinonitrile

A resealable vessel was charged with Pd₂dba₃ (0.893 g, 0.975 mmol,Strem), dicyclohexyl(2′,6′-dimethoxy-[1,1′-biphenyl]-2-yl)phosphine(0.858 g, 2.090 mmol, Strem), dicyanozinc (1.636 g, 13.93 mmol), and6-chloro-5-methylpyridin-3-ol (2.00 g, 13.93 mmol, step 3 intermediate34). The solids were taken up in DMF (45 mL) and the reaction mixturewas purged with Argon. The vessel was sealed and heated in a 110° C. oilbath. After 21 h, the reaction was filtered through Celite and thefilter cake was rinsed with 5% MeOH-DCM. The filtrate was concentratedand the residue was purified by silica gel chromatography, eluting with40% to 50% EtOAc-hexane to afford the title compound (676 mg, 32%). MSm/z=135 (M+H)⁺.

Step 2: 5-hydroxy-3-methylpicolinic acid

5-Hydroxy-3-methylpicolinonitrile (0.570 g, 4.25 mmol) was taken up inconcentrated aqueous HCl (28.3 mL, 340 mmol). The reaction mixture washeated in a 110° C. oil bath. After 24 h, the reaction was concentratedto afford the title compound (650 mg). The residue was used as is. MSm/z=154 (M+H)⁺.

Step 3: methyl 5-hydroxy-3-methylpicolinate

A sealable reaction vessel was charged with 5-hydroxy-3-methylpicolinicacid (0.651 g, 4.25 mmol) and MeOH (35 mL). The reaction vessel wasplaced in a water bath, and concentrated sulfuric acid (0.854 mL, 15.94mmol) was added. The vessel was sealed and heated in a 95° C. oil bath.After 24 h, the reaction mixture was concentrated and the residue wastaken up in 30 mL of 0.5M aqueous Na₂CO₃. The aqueous phase wasextracted with 10% MeOH-EtOAc (100 mL). The aqueous layer was separatedand saturated with NaCl. The aqueous phase was extracted with 10%MeOH-EtOAc (7×100 mL). The combined organic fractions were dried overMgSO₄ and concentrated. The residue was purified by silica gelchromatography, eluting with 3% to 4% MeOH-DCM to afford the titlecompound (593 mg). MS m/z=168 (M+H)⁺.

Step 4: 4-methylpent-2-yne-1,4-diol

In a 1-L flask, potassium hydroxide (23.52 g, 419 mmol) was suspended indiethyl ether (338 mL). The suspension was cooled to 0° and propargylalcohol (10.0 mL, 168 mmol, Aldrich) was added. After 1 h, acetone (36.9mL, 503 mmol) was added and the mixture was stirred overnight at rt. Thereaction mixture was cooled in an ice water bath and acidified withaqueous HCl (5M; 90 mL). The reaction mixture was diluted with 100 mL orwater. The layers were separated. The aqueous layer was saturated withNaCl and extracted with EtOAc (2×100 mL). The combined organic extractswere dried over MgSO₄ and concentrated under reduced pressure. Theresidue was purified by silica gel chromatography, eluting with 70% to80% EtOAc-hexane to afford the title compound (564 mg). ¹H NMR (400 MHz,CDCl₃) δ ppm 4.29 (d, J=6.1 Hz, 2H), 2.05 (d, J=6.1 Hz, 1H), 1.73 (m,1H), 1.53 (s, 6H).

Step 5: methyl5-((4-hydroxy-4-methylpent-2-yn-1-yl)oxy)-3-methylpicolinate

The title compound was synthesized analogously according to Method Sstarting from methyl 5-hydroxy-3-methylpicolinate and4-methylpent-2-yne-1,4-diol. MS m/z=264 (M+H)⁺.

Step 6: 5-((4-hydroxy-4-methylpent-2-yn-1-yl)oxy)-3-methylpicolinic acid

Using an analogous reaction to that described for Intermediate 5, step 2methyl 5-((4-hydroxy-4-methylpent-2-yn-1-yl)oxy)-3-methylpicolinate wasconverted into the title compound. MS m/z=250 (M+H)⁺.

Intermediate 39

Synthesis of 5-(Cyanomethoxy)-3-methylpicolinic acid Step 1: Methyl5-(cyanomethoxy)-3-methylpicolinate

To a suspension of methyl 5-hydroxy-3-methylpicolinate (0.8063 g, 4.82mmol, step 3 intermediate 38) and cesium carbonate (0.772 ml, 9.65 mmol,Alfa Aesar) in DMF (48.2 ml) was added bromoacetonitrile (0.336 ml, 4.82mmol, Sigma-Aldrich Chemical Company, Inc.). The reaction mixture wasstirred for 4 h at rt. The reaction mixture was diluted with aqueous,saturated sodium bicarbonate solution and extracted with EtOAc. Theorganic extract was washed with aqueous, saturated sodium bicarbonatesolution, brine and dried over MgSO₄. The filtrate was concentrated invacuo. MS m/z=207.1 [M+H]⁺. Calculated for C₁₀H₁₀N₂O₃: 206.069. ¹H NMR(400 MHz, CHLOROFORM-d) δ ppm 2.67 (s, 3H) 3.98 (s, 3H) 4.88 (s, 2H)7.20 (d, J=2.35 Hz, 1H) 8.32 (br. s., 1H)

Step 2: 5-(Cyanomethoxy)-3-methylpicolinic acid

To a solution of methyl 5-(cyanomethoxy)-3-methylpicolinate (0.895 g,4.34 mmol) and sodium iodide (0.354 ml, 8.68 mmol, Sigma-AldrichChemical Company, Inc.) in acetonitrile (4.34 ml) was addedchlorotrimethylsilane (1.102 ml, 8.68 mmol, Strem Chemicals, Inc.). Thereaction mixture was heated to 70° C. and allowed to stir overnight. Thereaction mixture was concentrated under reduced pressure and the residuewas diluted with water and extracted with EtOAc. The organic extract waswashed with water, 10% sodium thio sulfate solution and dried overMgSO₄. The filtrate was concentrated in vacuo to give5-(cyanomethoxy)-3-methylpicolinic acid which was used without furtherpurification. MS m/z=192.9 [M+H]⁺. Calculated for C₉H₈N₂O₃: 192.03

Intermediate 40 Method T

Synthesis of 5-(Thiazol-4-ylmethoxy)pyrazine-2-carboxylic acid Step 1:Thiazol-4-ylmethanol

To a solution of thiazole-4-carboxaldehyde (0.810 ml, 9.67 mmol,Combi-Blocks Inc.) in MeOH (48.3 ml) at 0° C. was added sodiumborohydride (0.341 ml, 9.67 mmol, Sigma-Aldrich Chemical Company, Inc.)in portions. The reaction mixture was allowed to stir for 1 hour.Saturated aqueous ammonium chloride solution was carefully added and thereaction mixture was filtered. The filtrate was concentrated in vacuo.The solid was taken up in 10% MeOH/DCM and filtered through a plug ofsilica gel to provide thiazol-4-ylmethanol (0.826 g, 7.18 mmol, 74.3%yield) as a yellow oil. MS m/z=116.0 [M+H]⁺. Calculated for C₄H₅NOS:115.009. ¹H NMR (400 MHz, CHLOROFORM-d) 3 ppm 2.58 (br. s., 1H) 4.86 (s,2H) 7.27-7.30 (m, 1H) 8.83 (d, J=1.76 Hz, 1H)

Step 2: Methyl 5-(thiazol-4-ylmethoxy)pyrazine-2-carboxylate

A RBF was charged with methyl 5-chloropyrazine-2-carboxylate (1.239 g,7.18 mmol, Ark Pharm), thiazol-4-ylmethanol (0.8266 g, 7.18 mmol),cesium carbonate (0.689 ml, 8.61 mmol, Alfa Aesar) and DMF (20.51 ml).The reaction mixture was stirred at 40° C. for 3 days. The reactionmixture was allowed to cool to rt and was diluted with water andextracted with EtOAc. The organic extract was washed with water, satdNaCl, dried over MgSO₄, and concentrated in vacuo. The crude product wasadsorbed onto a plug of silica gel and purified by silica gel flashchromatography, eluting with a gradient of 10% to 100% EtOAc in hexane,to provide methyl 5-(thiazol-4-ylmethoxy)pyrazine-2-carboxylate (0.7606g, 3.03 mmol, 42.2% yield). MS m/z=252.1 [M+H]⁺. Calculated forC₁₀H₉N₃O₃S: 251.036. ¹H NMR (400 MHz, DMSO-d₆) δ ppm 3.89 (s, 2H) 5.60(s, 1H) 7.86 (d, J=1.96 Hz, 1H) 8.46 (d, J=1.37 Hz, 1H) 8.86 (d, J=1.37Hz, 1H) 9.14 (d, J=1.96 Hz, 1H)

Step 3: 5-(Thiazol-4-ylmethoxy)pyrazine-2-carboxylic acid

To a solution of methyl 5-(thiazol-4-ylmethoxy)pyrazine-2-carboxylate(0.7606 g, 3.03 mmol) in 1,4-dioxane (15.14 ml) was added a 1 N solutionof sodium hydroxide (4.54 ml, 4.54 mmol) at rt. The reaction mixture wasallowed to stir for 16 hours. Hydrogen chloride (4.0M solution in1,4-dioxane; 1.135 ml, 4.54 mmol, Sigma Aldrich) was added and after 10minutes, the reaction mixture was concentrated in vacuo to give thetitle compound. MS m/z=237.9 [M+H]⁺. Calculated for C₉H₇N₃O₃S: 237.021.¹H NMR (400 MHz, DMSO-d₆) δ ppm 5.59 (s, 2H) 7.86 (d, J=1.96 Hz, 1H)8.45 (d, J=1.17 Hz, 1H) 8.83 (d, J=1.37 Hz, 1H) 9.14 (d, J=1.96 Hz, 1H)

Intermediate 41

Synthesis of 5-(Oxazol-2-ylmethoxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from oxazol-2-ylmethanol (Asatech, Inc.). MS m/z=221.9 [M+H]⁺.Calculated for C₉H₇N₃O₄: 221.044.

Intermediate 42

Synthesis of 5-(Thiazol-5-ylmethoxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from 5-(hydroxymethyl)thiazole (Oakwood Products, Inc.). MSm/z=237.9 [M+H]⁺. Calculated for C₉H₇N₃O₃S: 237.02.

Intermediate 43

Synthesis of 5-(Oxazol-5-ylmethoxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from 1,3-oxazol-5-methanol (Combi-Blocks Inc.). MS m/z=222.1[M+H]⁺. Calculated for C₉H₇N₃O₄: 221.04.

Intermediate 44

Synthesis of 5-(Oxazol-4-ylmethoxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from oxazol-4-ylmethanol (J&W Pharmlab). MS m/z=221.9 [M+H]⁺.Calculated for C₉H₇N₃O₄: 221.04.

Intermediate 45

Synthesis of 5-(Thiazol-2-ylmethoxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from 1,3-thiazol-2-ylmethanol (Maybridge Chemical Co., Ltd.).MS m/z=237.9 [M+H]⁺. Calculated for C₉H₇N₃O₃S: 237.02.

Intermediate 46

Synthesis of (S)-5-(But-3-yn-2-yloxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from (S)-(−)-3-butyn-2-ol (Alfa Aesar, A Johnson MattheyCompany). MS m/z=192.9 [M+H]⁺. Calculated for C₉H₈N₂O₃: 192.05

Intermediate 47

Synthesis of (R)-5-(But-3-yn-2-yloxy)pyrazine-2-carboxylic acid

The title compound was synthesized according to the above method Tstarting from (R)-(+)-3-butyn-2-ol (Aldrich). MS m/z=193 [M+H]⁺.Calculated for C₉H₈N₂O₃: 192.05

Intermediate 48

Synthesis of 5-isopropoxypyrazine-2-carboxylic acid

To a rt solution of sodium t-butoxide (1.41 g, 14.67 mmol) in THF (20mL) was added 2-propanol (1.250 mL, 16.33 mmol) dropwise. After 10 min asolution of methyl 5-chloro-2-pyrazinecarboxylate (1.70 g, 9.85 mmol,Ark Pharm) in THF (10 mL) was added dropwise. After 1.5 h, the reactionwas quenched with saturated aq NH4Cl and extracted with EtOAc (3×). Theaqueous layer was concentrated under reduced pressure and the resultingsolid was treated with aqueous HCl. The solution was extracted with DCM(3×) and the combined organic layers were purified by flashchromatography, eluting with 0.5% TFA in iPrOH:CH₂Cl₂ (0:1→1:9) to givea white crystalline solid. (497 mg, 2.7 mmol, 28%). MS m/z=183 [M+H]⁺.Calculated for C₈H₁₀N₂O₃: 182.

Intermediate 49

Synthesis of 2-(1-Fluoroethyl)oxazole-4-carboxylic acid Step 1: Methyl2-(2-fluoropropanamido)-3-hydroxypropanoate

A rbf was charged with DL-serine methyl ester hydrochloride (1.49 g,9.57 mmol, Sigma-Aldrich Chemical Company, Inc.), HATU (4.37 g, 11.49mmol, Sigma-Aldrich Chemical Company, Inc.) and DCM (22 mL).2-Fluoropropionic acid (0.75 ml, 9.57 mmol, Alfa Aesar, A JohnsonMatthey Company) and triethylamine (3.3 ml, 23.93 mmol, Sigma-AldrichChemical Company, Inc.) were added and the reaction mixture was allowedto stir at rt overnight. The reaction mixture was diluted with water andextracted with DCM. The organic extract was washed with water, aqueoussaturated NaHCO₃ solution, brine, and dried over MgSO₄. The solution wasconcentrated in vacuo and the crude product was purified by silica gelchromatography, eluting with a gradient of 1% to 10% MeOH in DCM, toprovide methyl 2-(2-fluoropropanamido)-3-hydroxypropanoate (0.69 g, 3.60mmol, 38% yield).

¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 1.40 (t, J=7.31 Hz, 5H) 1.50-1.77(m, 3H) 3.23 (qd, J=7.31, 5.12 Hz, 3H) 3.82 (s, 3H) 3.88-4.15 (m, 2H)4.69 (dt, J=7.53, 3.69 Hz, 1H) 4.87-5.21 (m, 1H)

Step 2: Methyl 2-(1-fluoroethyl)oxazole-4-carboxylate

A solution of methyl 2-(2-fluoropropanamido)-3-hydroxypropanoate (0.69g, 3.60 mmol) in DCM (36.0 ml) was cooled to −20° C. and deoxo-fluor(50% in THF; 0.73 ml, 3.96 mmol, Fluka Chemie GmbH) was added dropwise.The reaction mixture was allowed to stir for 1 hour.Bromotrichloromethane (1.276 ml, 12.96 mmol, Sigma-Aldrich ChemicalCompany, Inc.) was added followed by addition of DBU (1.936 ml, 12.96mmol, TCI). The reaction mixture was allowed to warm to 0° C. andstirred for 3 h. The reaction was quenched by the addition of aqueous,saturated NaHCO₃ solution and extracted with CH₂Cl₂. The organic extractwas washed with water, brine and dried over MgSO₄. The solvent wasremoved in vacuo and the crude product was purified by silica gelchromatography, eluting with a gradient of 1% to 10% 2M NH3.MeOH inCH₂Cl₂, to provide methyl 2-(1-fluoroethyl)oxazole-4-carboxylate (0.2746g, 1.586 mmol, 44.1% yield). MS m/z=173.9 [M]⁺; Calculated for C₇H₈FNO₃:173.049

Step 3: 2-(1-Fluoroethyl)oxazole-4-carboxylic acid

Using an analogous reaction to that described for Intermediate 5, step 2methyl 2-(1-fluoroethyl)oxazole-4-carboxylate was converted into thetitle compound. MS m/z=159.9 [M+H]⁺. Calculated for C₆H₆FNO₃: 159.03

Intermediate 50

Synthesis of 4-Chloro-1-isopropyl-1H-pyrazole-3-carboxylic acid Step 1:Methyl 1-isopropyl-1H-pyrazole-3-carboxylate

To a solution of 1-isopropyl-1h-pyrazole-3-caboxylic acid (0.9757 g,6.33 mmol, Matrix Scientific) in MeOH (31.6 ml) in a glass pressurevessel was added sulfuric acid (0.355 ml, 6.33 mmol Sigma Aldrich). Thevessel was sealed and the rxn was brought to reflux to stir. (NOTE: Aportable blast shield was used.) Rxn was allowed to stir for 5 hours.The rxn was concentrated in vacuo. The residue was diluted with waterand extracted with EtOAc. The organic extract was washed with water,dried over MgSO₄, filtered and concentrated in vacuo to give methyl1-isopropyl-1H-pyrazole-3-carboxylate (0.8073 g, 4.80 mmol, 76% yield)as a clear oil. MS m/z=168.9 [M+H]⁺. Calculated for C₈H₁₂N₂O₂: 168.09.¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.55 (d, J=6.85 Hz, 6H) 3.93 (s,3H) 4.63 (dt, J=13.50, 6.75 Hz, 1H) 6.83 (d, J=2.35 Hz, 1H) 7.46 (d,J=2.35 Hz, 1H)

Step 2: Methyl 4-chloro-1-isopropyl-1H-pyrazole-3-carboxylate

To a solution of methyl 1-isopropyl-1H-pyrazole-3-carboxylate (0.8073 g,4.80 mmol) in DMF (9.60 ml) was added n-chlorosuccinimide (3.20 g, 24.00mmol, Sigma Aldrich). The reaction mixture was heated to 70° C. for 4.5h. The reaction mixture was diluted with water and extracted with EtOAc.The organic extract was washed with water, brine, dried over MgSO₄,filtered and concentrated in vacuo. The crude product was purified bysilica gel chromatography, eluting with a gradient of 10% to 30% EtOAcin hexane, to provide methyl4-chloro-1-isopropyl-1H-pyrazole-3-carboxylate (0.2705 g, 1.335 mmol,27.8% yield) as an off-white solid. MS m/z=203.0[M+H]⁺. Calculated forC₈H₁₁ClN₂O₂: 202.051. ¹H NMR (400 MHz, DMSO-d₆) δ ppm 1.42 (d, J=6.85Hz, 6H) 3.80 (s, 3H) 4.55 (dt, J=13.30, 6.65 Hz, 1H) 8.23 (s, 1H)

Step 3: 4-chloro-1-isopropyl-1H-pyrazole-3-carboxylic acid

Using an analogous reaction to that described for Intermediate 5, step 2methyl 4-chloro-1-isopropyl-1H-pyrazole-3-carboxylate was converted intothe title compound. MS m/z=188.9 [M+H]⁺. Calculated for C₇H₉ClN₂O₂:188.035. ¹H NMR (400 MHz, DMSO-d₆) δ ppm 1.41 (d, J=6.65 Hz, 6H) 4.52(quin, J=6.70 Hz, 1H) 8.17 (s, 1H) 12.89 (br. s., 1H)

Intermediate 51

Synthesis of 2-(difluoromethyl)thiazole-4-carboxylic acid Step 1.2,2-difluoroethanethioamide

To a solution of difluoroacetonitrile (0.650 ml, 9.45 mmol) in MeOH (20mL) was added ammonium sulfide (40-48 wt. % solution in water; 2.00 ml,11.74 mmol) dropwise at rt. After stirring over 2.5 days the reactionmixture was concentrated to dryness to give 1.023 g (97%) of an orangeamorphous solid. The material was carried on to the next step withoutfurther purification. MS m/z=180 [M+H]⁺. Calculated for C₂H₃F₂NS: 179.

Step 2. ethyl 2-(difluoromethyl)thiazole-4-carboxylate

A mixture of 2,2-difluoroethanethioamide (1.023 g, 9.21 mmol) and ethylbromopyruvate (1.150 mL, 9.21 mmol) in EtOH (20 mL) was heated to 50° C.for 2 h. The reaction mixture was cooled to rt and purified by silicagel flash chromatography, eluting with EtOAc:hexanes (0:1→1:1) to give964 mg (51%) of a brown oil. MS m/z=208 [M+H]⁺. Calculated forC₇H₇F₂NO₂S: 207.

Step 3. 2-(difluoromethyl)thiazole-4-carboxylic acid

Using an analogous reaction to that described for Intermediate 5, step 2ethyl 2-(difluoromethyl)thiazole-4-carboxylate was converted into thetitle compound. MS m/z=180 [M+H]⁺. Calculated for C₅H₃F₂NO₂S: 179.

Intermediate 52

Synthesis of 2-(difluoromethyl)oxazole-4-carboxylic acid Step 1. methyl2-(difluoromethyl)-4,5-dihydrooxazole-4-carboxylate

To a cooled (0° C.) solution of sodium methoxide (25 wt % solution inmethanol; 0.230 mL, 1.032 mmol) and MeOH (20 mL) was added dropwisedifluoroacetonitrile (0.690 mL, 10.03 mmol) while maintaining aninternal temperature of <1° C. After 20 min DL-serine methyl esterhydrochloride (1.55 g, 9.96 mmol) was added followed by MeOH (20 mL) andthe reaction was allowed to warm to rt overnight. Subsequently, thereaction was heated to 55° C. for 5 h. The reaction was cooled to rt andpartitioned between DCM/water. The aqueous layer was extracted with DCM(3×) and the combined organic layers were washed with water and driedover MgSO₄. The filtrate was concentrated in vacuo to give 1.59 g (89%)of a light-brown oil. MS m/z=180 [M+H]⁺. Calculated for C₆H₇F₂NO₃:179.

Step 2. methyl 2-(difluoromethyl)oxazole-4-carboxylate

To a cooled (0° C.) suspension of copper(II) bromide (5.95 g, 26.6 mmol)in DCM (50 ml) was added hexamethylenetetramine (3.73 g, 26.6 mmol,Aldrich) followed by 1,8-diazabicyclo[5.4.0]undec-7-ene (4.0 ml, 26.8mmol, Aldrich). After 20 min a solution of methyl2-(difluoromethyl)-4,5-dihydrooxazole-4-carboxylate (1.59 g, 8.88 mmol)in DCM (5 mL) was added and the reaction mixture was allowed to warm tort and stirred for 2 h. The mixture was filtered and the filtrate wasconcentrated to dryness. The residue was partitioned between EtOAc and1:1 satd NH₄Cl-conc NH₄OH. The aqueous layer was extracted with EtOAc(3×) and the combined organic layers were washed consecutively with 1:1satd NH₄Cl-conc NH₄OH (1×), 10% citric acid (1×), satd NaHCO₃ (1×) andbrine (1×). The organic layer was dried over MgSO4. The filtrate waspurified by silica gel flash chromatography, eluting with 25%EtOH/EtOAc:hexanes (0:1→1:0) to give 708 mg (45%) of a white crystallinesolid. MS m/z=178 [M+H]⁺. Calculated for C₆H₅F₂NO₃:177.

Step 3. 2-(difluoromethyl)oxazole-4-carboxylic acid

Using an analogous reaction to that described for Intermediate 5, step 2methyl 2-(difluoromethyl)oxazole-4-carboxylate was converted into thetitle compound. MS m/z=164 [M+H]⁺. Calculated for C₅H₃F₂NO₃: 163.

Intermediate 53

Synthesis of 2-(cyclopropylethynyl)oxazole-4-carboxylic acid Step 1.ethyl 2-(cyclopropylethynyl)oxazole-4-carboxylate

A mixture of 2-bromo-oxazol-4-carboxylic ethyl ester (0.967 g, 4.40mmol, Combi-Blocks), trans-dichlorobis(triphenylphosphine)palladium (II)(0.201 g, 0.286 mmol, Strem) and copper (I) iodide (0.165 g, 0.866 mmol,Aldrich) in toluene (15 ml) was purged with argon for 10 min.Ethynylcyclopropane (1.00 ml, 11.80 mmol) and triethylamine (1.70 ml,12.22 mmol) were added. After 2.5 h, the reaction mixture waspartitioned between CH₂Cl₂ and water. The aqueous layer was extractedwith CH₂Cl₂ (3×). The combined organic layers were washed with brine.The solvent was removed under reduced pressure and the residue and waspurified by silica gel flash chromatography, eluting with(EtOAc):hexanes (0:1→2:3) to give 452 mg (50%) of a light-orange oil. MSm/z=206 [M+H]⁺. Calculated for C₁₁H₁₁NO₃: 205.

Step 2. 2-(cyclopropylethynyl)oxazole-4-carboxylic acid

Using an analogous reaction to that described for Intermediate 5, step 2ethyl 2-(cyclopropylethynyl)oxazole-4-carboxylate was converted into thetitle compound. MS m/z=178 [M+H]⁺. Calculated for C₉H₇NO₃: 177.

Intermediate 54

Synthesis of 7-bromo-2-methyl-2H-pyrazolo[3,4-c]pyridine Step 1.7-bromo-1H-pyrazolo[3,4-c]pyridine

To a cooled (13° C.) mixture of 3-amino-2-bromo-4-picoline (4.5 g, 24.06mmol, Combi-Blocks) and potassium acetate (3.09 g, 31.5 mmol) in AcOH(100 mL) was added a solution of sodium nitrite (2.01 g, 29.1 mmol) inwater (10 mL) dropwise. Upon complete addition the reaction mixture wasallowed to slowly warm to rt for 66 h. A solution of NaNO₂ (706 mg) inwater (3 mL) was added to the reaction mixture and the reaction mixturewas stirred for 5 h. The solvent was removed under reduced pressure andthe residue was basified with saturated NaHCO₃. The aqueous layer wasextracted with EtOAc (3×) and the combined organic layers were washedwith water then brine, and dried over MgSO₄. The filtrate was purifiedby silica gel flash chromatography, eluting with EtOAc:hexanes (0:1→1:1)to give a white crystalline solid (1.38 g, 7.0 mmol, 29%). MS m/z=198[M+H]⁺. Calculated for C₆H₄BrN₃: 198.

Step 2. 7-bromo-2-methyl-2H-pyrazolo[3,4-c]pyridine

To a suspension of sodium hydride (57% in mineral oil; 0.052 g, 1.235mmol) in DMF (4 mL) was added 7-bromo-1H-pyrazolo[3,4-c]pyridine (0.197g, 0.995 mmol) in portions at room temperature. After 30 min iodomethane(0.070 mL, 1.127 mmol) was added. After 1.5 h the reaction was quenchedwith water (20 mL) and the solution was extracted with EtOAc (3×). Thecombined organic layers were purified by silica gel flashchromatography, eluting with MeOH (0:1→1:19) to give an off-whitecrystalline solid (19 mg, 0.09 mmol, 9%). MS m/z=214 [M+H]⁺. Calculatedfor C₇H₆BrN₃: 212.

Intermediate 56

Synthesis of 5-chloro-3-(prop-1-en-2-yl)picolinic acid

A microwave glass vessel was charged with3-bromo-5-chloropicolinonitrile (0.5 g, 2.3 mmol),tetrakis(triphenylphosphine)palladium(0) (0.13 g, 0.115 mmol) and sodiumcarbonate (0.731 g, 6.90 mmol). The vial was evacuated and back-filledwith nitrogen. Dioxane (10 mL) and water (3 mL) were added. The reactionmixture was degassed and isopropenylboronic acid pinacol ester (0.474ml, 2.53 mmol) was added. The reaction mixture was heated to 90° C. for2 hs. The reaction mixture was partitioned between water and EtOAc. Theorganic phase was dried over MgSO₄ and concentrated in vacuo. Theresidue was dissolved in EtOH (7 mL) and NaOH (5M, 3 mL). The solutionwas heated to 115° C. for 1.5 hrs. The reaction mixture was partitionedbetween water and EtOAc. The organic phase was discarded and the aq.phase was acidified with aq. 2 M HCl and extracted with EtOAc. Theorganic phase was dried over MgSO₄ and concentrated under reducedpressure to obtain the title compound as a light-yellow solid (0.373 g,82%). MS m/z=198.1 [M+H]⁺. Calculated for C₉H₈ClNO₂: 197.024

Intermediate 57

Synthesis of 5-chloro-3-isopropylpicolinic acid

A sealable vial was charged with 5-chloro-3-(prop-1-en-2-yl)picolinicacid (373 mg, 1.887 mmol) and EtOH (100 mL). The solution was purgedwith Nitrogen. Pt on activated carbon (479 mg, 0.245 mmol) was added,followed by glacial acetic acid (0.4 mL). The reaction mixture wasevacuated, backfilled with hydrogen and stirred for 30 min at rt. Thereaction mixture was filtered through a pad of celite to obtain thetitle compound as a white solid. The product contained minor amounts ofdehalogenated product. The product was used in the next step withoutfurther purification. MS m/z=200.1 [M+H]⁺. Calculated for C₉H₁₀ClNO₂199.040

Intermediate 58

Synthesis of 3-bromo-5H-cyclopenta[b]pyridin-7(6H)-one Step 1

To a mixture of 3-bromo-6,7-dihydro-5H-cyclopenta[b]pyridine (1.83 g,9.24 mmol) and potassium acetate (0.980 g, 9.99 mmol) in acetic acid (30mL, 520 mmol) was added benzaldehyde (1.90 ml, 18.7 mmol). The reactionmixture was heated to 145° C. (oil bath temperature) in a sealedpressure tube for 3 d, cooled to room temperature and additionalbenzaldehyde (4 mL) and KOAc (1.83 g) were added. The reaction mixturewas heated to 145° C. (oil bath temperature) in a sealed pressure tubefor 2 d and cooled to room temperature. The reaction mixture was dilutedwith EtOAc. The organic phase was washed with 5 M NaOH, water and brineand dried over MgSO₄. The filtrate was concentrated under reducedpressure and the residue was purified by flash column chromatography onsilica gel (5% to 10% EtOAc in heptane) to give(E)-7-benzylidene-3-bromo-6,7-dihydro-5H-cyclopenta[b]pyridine (1.57 g,5.49 mmol, 59% yield) as a yellow solid. MS m/z=286.0 [M+H]+. Calculatedfor C₁₅H₁₂BrN 285.0.

Step 2

A solution of(E)-7-benzylidene-3-bromo-6,7-dihydro-5H-cyclopenta[b]pyridine (1.61 g,5.63 mmol) in MeOH (75 mL) and DCM (75 mL) was cooled to −78° C. and astream of ozone in oxygen was bubbled through the solution for 10 minuntil the solution turned light blue. Oxygen was pass through thesolution for 10 min until the solution turned colorless.Triphenylphosphine (3.63 g, 13.8 mmol) was added and the reactionmixture was allowed to warm to room temperature. The reaction mixturewas stirred at room temperature for 1.5 h and then concentrated underreduced pressure. The residue was purified by flash columnchromatography on silica gel (80 g, 30% to 70% EtOAc in heptane) to give3-bromo-5H-cyclopenta[b]pyridin-7(6H)-one (1.14 g, 5.38 mmol, 96% yield)as a yellow solid. MS m/z=211.9 [M+H]+. Calculated for C₈H₆BrNO 211.0.

Intermediate 59

Synthesis of 5-bromo-2-fluoro-1-iodo-3-methylbenzene

A PFA plastic round bottom flask was charged with a solution of hydrogenfluoride pyridine (70 wt % HF, 100 ml, 1150 mmol). The solution wascooled to 0° C. and 4-bromo-2-iodo-6-methylaniline (9.2 g, 29.5 mmol,Organic Letters 2009, 11, 249-251) was added portion wise. After 15minutes, sodium nitrite (1.032 ml, 32.4 mmol) was added and the reactionmixture was stirred at 0° C. for additional 15 minutes. The reactionmixture was allowed to warm to room temperature and stirred for 15minutes, followed by heating at 90° C. for 3 hour. The reaction mixturewas then cooled to room temperature and quenched with water and diethylether. The organic layer was separated, washed with brine and dried overmagnesium sulfate. The filtrate was concentrated under reduced pressure.The crude material was purified via silica gel chromatography elutingwith hexanes to afford the title compound (8.45 g, 26.8 mmol, 91% yield)as a brown solid.

1H NMR (300 MHz, CHLOROFORM-d) δ ppm 2.29 (s, 3H) 7.27-7.34 (m, 1H)7.64-7.75 (m, 1H)

Intermediate 60

Synthesis of1-bromo-4-fluoro-5-iodo-2-(((4-methoxybenzyl)-oxy)-methyl)-benzene

A solution of n-Butyllithium (2.5M in hexanes, 42.9 mL, 107 mmol) wasadded drop wise to a solution of freshly distilled2,2,6,6-tetramethylpiperidine (18.11 mL, 107 mmol) in THF (220 mL) at−78° C. The solution was warmed to 0° C. for 30 minutes and then cooledagain to −78° C. In a separate flask, a solution of2-bromo-5-fluorobenzyl alcohol (10 g, 48.8 mmol) in THF (60 mL) wascooled to −78° C. and was transferred via cannula to the LiTMP solution.The resulting reaction mixture was stirred for 2 h at −78° C.Subsequently, a solution of iodine (14.86 g, 58.5 mmol) in THF (60 mL)was added dropwise and the reaction mixture was stirred 40 minutesbefore the reaction was quenched with saturated aqueous ammoniumchloride at −78° C. After diluting with aqueous sodium thiosulfate andEtOAc, the layers were separated and the aqueous layer was extractedwith EtOAc. The combined organic extracts were washed with saturatedaqueous ammonium chloride, water, brine, and dried over sodium sulfate.The filtrate was concentrated in vacuo and the resulting crude productwas taken up in THF (48 ml) and DMF (8 ml) and cooled to 0° C. Sodiumhydride (60% in mineral oil, 0.341 g, 8.52 mmol) was added in oneportion and after 15 minutes, 4-methoxybenzyl chloride (1.253 ml, 9.23mmol) was added and the solution was stirred overnight at roomtemperature. The reaction mixture was cooled to 0° C. and quenched with1N HCl. After dilution with water and EtOAc, the layers were separatedand the aqueous layer was extracted with EtOAc. The combined organicextracts were washed with aqueous lithium bromide solution, brine, anddried over sodium sulfate. The filtrate was concentrated in vacuo togive the crude material. The crude material was purified by silica gelchromatography, eluting with 1:30 Et₂O in heptane, to afford1-bromo-4-fluoro-5-iodo-2-(((4-methoxybenzyl)oxy)methyl)benzene as a˜2:1 mixture with1-bromo-4-fluoro-2-(((4-methoxybenzyl)oxy)methyl)benzene. LC/MS (ESI⁺)m/z=472.9/474.8 (M+Na).

Intermediate 61

Synthesis of 4-(prop-1-yn-1-yl)-1H-pyrazole

A sealable vial was charged with a solution of tert-butyl4-bromo-1H-pyrazole-1-carboxylate (1 g, 4.05 mmol) and triethylamine(2.81 mL, 20.24 mmol) in DMF (6.75 mL). The solution was purged withnitrogen for 10 minutes. Copper (I) iodide (0.077 g, 0.405 mmol) andtetrakis(triphenylphosphine)palladium (0.234 g, 0.202 mmol) were addedand 1-propyne was bubbled through the solution for 2 min. The reactionmixture was heated at 70° C. overnight. The reaction was poured into a9:1 mixture of aqueous saturated ammonium chloride/ammonium hydroxideand the mixture was extracted with EtOAc. The combined organic extractswere washed with a 9:1 mixture of aqueous saturated ammoniumchloride/ammonium hydroxide, aqueous lithium bromide solution, brine,and dried over sodium sulfate. The filtrate was concentrated in vacuoand the residue was purified by silica gel chromatography, eluting with1:9 EtOAc in heptane, to provide tert-butyl4-(prop-1-yn-1-yl)-1H-pyrazole-1-carboxylate, which was taken up in MeOHand treated with excess solid K₂CO₃ for 15 minutes. The reaction mixturewas filtered and the filtrate was concentrated under reduced pressureThe crude material was partitioned between DCM and water. The layerswere separated and the aqueous layer was extracted with DCM. Thecombined organic extracts were washed with brine and dried over sodiumsulfate. The filtrate was concentrated in vacuo to afford4-(prop-1-yn-1-yl)-1H-pyrazole. LC/MS (ESP) m/z=107.0 (M+H).

Intermediate 62

Synthesis of 4-(cyclopropylethynyl)-1H-pyrazole

The title compound was synthesized according to the procedure describedfor 4-(prop-1-yn-1-yl)-1H-pyrazole (intermediate 61) above, but usingcyclopropylacetylene. LC/MS (ESC) m/z=133.1 (M+H).

The following carboxylic acid intermediates were synthesized accordingto existing literature procedures, as listed below:

Inter- mediate Literature # Structure Reference 63

WO2012095463 64

WO2012095463 65

WO2012095521 66

WO2012095521 67

WO2012954463 68

WO2013061962 69

WO2012138734 70

WO2012078994 71

WO2011069934 72

WO2011069934 73

WO2011044181 74

WO2011044181 75

WO 2011009898 76

WO 2012147763 77

J. Med. Chem. 2013, 56, 3980 78

J. Med. Chem. 2013, 56, 3980 79

J. Med. Chem. 2013, 56, 3980 80

J. Med. Chem. 2013, 56, 3980

Intermediate 81

Synthesis of5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylic acid Step1: Methyl 5-aminopyrimidine-2-carboxylate

A suspension of 5-aminopyrimidine-2-carboxylic acid (GoldenbridgePharma, Inc.; 5.70 g, 41.0 mmol) in MeOH (120 mL) was cooled in anice-water bath and treated dropwise with thionyl chloride (8.97 mL, 123mmol). The resulting suspension was heated at reflux for 20 h and thenconcentrated to give a yellow solid. The solid was dissolved insaturated aqueous NaHCO₃ (60 mL) and extracted into EtOAc using a GregarExtractor. The extract was concentrated to give methyl5-aminopyrimidine-2-carboxylate (4.26 g, 68% yield) as an off-whitesolid. ¹H NMR (400 MHz, CDCl₃): δ 8.32 (s, 2H), 4.35 (br s, 2H), 4.02(s, 3H).

Step 2: Methyl 5-((tert-butoxycarbonyl)amino)pyrimidine-2-carboxylate

A solution of methyl 5-aminopyrimidine-2-carboxylate (1.37 g, 8.96 mmol)in DMF (15 mL) was treated with di-tert-butyl dicarbonate (2.15 g, 9.86mmol) and stirred at ambient temperature for 5 min. DMAP (0.11 g, 0.90mmol) was added and the solution was stirred at ambient temperature for20 h. The resulting suspension was concentrated and purified by flashchromatography on silica gel eluting with a gradient of 0 to 40% EtOAcin DCM to give methyl5-((tert-butoxycarbonyl)amino)pyrimidine-2-carboxylate (1.31 g, 58%yield) as a white crystalline solid. ¹H NMR (400 MHz, CDCl₃): δ 9.01 (s,2H), 6.78 (br. s, 1H), 4.05 (s, 3H), 1.54 (s, 9H).

Step 3: Methyl5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylate

A solution of methyl5-((tert-butoxycarbonyl)amino)pyrimidine-2-carboxylate (1.31 g, 5.16mmol) in DMF (13 mL) was treated with cesium carbonate (2.19 g, 6.71mmol) followed by iodomethane (0.64 mL, 10.32 mmol). The resultingsuspension was stirred at ambient temperature for 5 h. The suspensionwas diluted with DCM (50 mL), filtered, concentrated, and purified byflash chromatography on silica gel eluting with a gradient of 0 to 40%EtOAc in DCM to give methyl5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylate (1.16 g,84% yield) as a white solid. ¹H NMR (400 MHz, CDCl₃): δ 8.91 (s, 2H),4.07 (s, 3H), 3.38 (s, 3H), 1.52 (s, 9H).

Step 4: 5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylate

A solution of methyl5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylate (1.16 g,4.35 mmol) in THF (15 mL) was treated with a 1.0 M aqueous solution ofLiOH (4.6 mL, 4.6 mmol) and the solution was stirred at ambienttemperature for 16 h. The mixture was concentrated and lyophilized from1,4-dioxane to give lithium5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylate (1.16 g,100% yield) as a white powder. ¹H NMR (400 MHz, DMSO-d₆): δ 8.63 (s,2H), 3.24 (s, 3H), 1.43 (s, 9H).

Intermediate 82

Synthesis of a mixture of 3-fluoro-5-methoxypicolinic acid and5-fluoro-3-methoxypicolinic acid Step 1: Mixture of3-fluoro-5-hydroxypicolinic acid and 5-fluoro-3-hydroxypicolinic acid

To a sealable tube was added 3,5-difluoropyridine-2-carboxylic acid (2.0g, 12.57 mmol, Lancaster Synthesis Ltd.), lithium hydroxide hydrate(5.28 g, 126 mmol, Aldrich), and water (50 mL). The resulting mixturewas stirred at 100° C. for 20 h. Then the mixture was cooled to RT andTFA (5.0 mL, 67.3 mmol, Aldrich) was added to the mixture. The mixturewas concentrated and dried in vacuo overnight to provide 12.6 g of acrude product mixture of 3-fluoro-5-hydroxypicolinic acid and5-fluoro-3-hydroxypicolinic acid, as a white solid, used directly in thenext step. MS (ESI, positive ion) m/z: 158.1 (M+H) observed for bothisomers.

Step 2: Mixture of methyl 3-fluoro-5-methoxypicolinate and methyl5-fluoro-3-methoxypicolinate

To a solution of 3-fluoro-5-hydroxypicolinic acid (1.98 g, 12.57 mmol)and 5-fluoro-3-hydroxypicolinic acid in DMF (100 mL, Aldrich) was addedcesium carbonate (2.5 mL, 31.4 mmol, Aldrich) and iodomethane,stabilized (1.7 mL, 27.7 mmol, Alfa Aesar, A Johnson Matthey Company).The reaction was stirred at room temperature for 48 hours. Cesiumcarbonate (20.48 g, 62.8 mmol, Aldrich) and iodomethane, stabilized (3.4mL, 55.4 mmol, Alfa Aesar) were added. The resulting mixture was stirredat room temperature for 16 hours. The mixture was diluted with H₂O (500mL) and extracted with EtOAc (2×500 mL). The combined extracts werewashed with H₂O (1×500 mL), dried over MgSO₄, concentrated, and dried invacuo to give 1.18 g of products as a mixture of methyl3-fluoro-5-methoxypicolinate and methyl 5-fluoro-3-methoxypicolinate asa light yellow solid. MS (ESI, positive ion) m/z: 186.1 (M+H) observedfor both isomers.

Step 3: Mixture of 3-fluoro-5-methoxypicolinic acid and5-fluoro-3-methoxypicolinic acid

To a solution of methyl 3-fluoro-5-methoxypicolinate (1.18 g, 6.37 mmol)and methyl 5-fluoro-3-methoxypicolinate in MeOH (30 mL, Aldrich) andwater (10 mL) at 0° C. was added lithium hydroxide hydrate (0.53 g,12.74 mmol, Aldrich). After addition, the mixture was then stirred atroom temperature for 1 h. The mixture was concentrated and H₂O (25 mL)was added. The resulting mixture was adjusted to pH=5-6 by HCl (2N). Themixture was concentrated and dried. The residue was dissolved in MeOH(100 mL), adsorbed onto silica, and purified by silica gel flashchromatography using a gradient of 0%-40% MeOH in DCM to give 1.67 g(white solid) of products as a mixture of 3-fluoro-5-methoxypicolinicacid and 5-fluoro-3-methoxypicolinic acid. MS (ESI, positive ion) m/z:172.1 (M+H) observed for both isomers.

Intermediate 83

Synthesis of 5-cyanopyrimidine-2-carboxylic acid Step 1: methyl5-bromopyrimidine-2-carboxylate

To a solution of 5-bromopyrimidine-2-carboxylic acid (3.22 g, 15.9 mmol)in MeOH (50 mL) at room temperature was added acetyl chloride (4.0 mL,56.3 mmol). The reaction mixture was heated to reflux for 15 min, cooledto room temperature and concentrated under reduced pressure. Thereaction mixture was diluted with saturated NaHCO₃ (30 mL) and EtOAc,and transferred to a separatory funnel. The aqueous phase was extractedwith EtOAc (4×) and the combined organic extracts were washed with brine(1×), dried over MgSO₄, filtered, and concentrated to give methyl5-bromopyrimidine-2-carboxylate (2.30 g, 10.6 mmol, 67% yield) as awhite solid. LC/MS (ESI⁺) m/z=216.9 (M+H). Calculated for C₆H₅BrN₂O₂216.0.

Step 2: methyl 5-cyanopyrimidine-2-carboxylate

To a mixture of methyl 5-bromopyrimidine-2-carboxylate (2.30 g, 10.6mmol) and copper (I) cyanide (1.92 g, 21.4 mmol) in a 100 mL roundbottom flask was added DMA (21 mL). The reaction mixture was degassed bybubbling nitrogen through the solution for 5 min. The reaction mixturewas heated to 110° C. for 2 d and cooled to room temperature. Thereaction mixture was diluted with EtOAc and water and filtered through aglass frit (medium). The filtrate was transferred to a separatoryfunnel. The aqueous phase was extracted with EtOAc (4×) and the combinedorganic extracts were washed with brine (1×), dried over MgSO₄,filtered, concentrated to give a yellow oil. Purification by flashcolumn chromatography on silica gel (80 g, 5% to 50% EtOAc in heptane)gave methyl 5-cyanopyrimidine-2-carboxylate (0.83 g, 5.08 mmol, 48%yield) as a white solid. LC/MS (ESI⁺) m/z=164.0 (M+H). Calculated forC₇H₅N₃O₂ 163.0.

Step 3: 5-cyanopyrimidine-2-carboxylic acid

To a solution of methyl 5-cyanopyrimidine-2-carboxylate (0.11 g, 0.644mmol) in THF (2.6 mL) at 0° C. was added a solution of lithium hydroxidemonohydrate (30 mg, 0.715 mmol) in water (0.5 mL). The reaction mixturewas stirred at 0° C. for 20 min and 1 M HCl (0.70 mL) was added. Thereaction mixture was concentrated under reduced pressure and dried underhigh vacuum to give methyl 5-cyanopyrimidine-2-carboxylate (0.11 g,0.644 mmol) as a white solid that was used without further purification.LC/MS (ESI⁺) m/z=148.0 (M−H). Calculated for C₆H₃N₃O₂ 149.0.

Intermediate 84

Synthesis of 5-ethynylpicolinic acid Step 1: Methyl5-((triethylsilyl)ethynyl)picolinate

A glass microwave reaction vessel was charged with methyl5-bromopyridine-2-carboxylate (0.95 ml, 6.94 mmol, Alfa Aesar),(triethylsilyl) acetylene (3.73 ml, 20.81 mmol, Sigma-Aldrich),tetrakis(triphenylphosphine) palladium (0.61 g, 0.527 mmol, StremChemicals), triethylamine (4.82 ml, 34.7 mmol, Sigma-Aldrich Chemical),and copper (I) iodide (0.04 ml, 1.040 mmol, Sigma-Aldrich). The reactionmixture was stirred and heated in a Biotage Initiator microwave reactorat 70° C. for 30 min. The reaction mixture was filtered through celiteand concentrated. The reaction mixture was diluted with saturated NH₄Cland extracted with EtOAc. The organic extract was washed with water andbrine, dried over MgSO₄, filtered and concentrated in vacuo. The crudeproduct was adsorbed onto a plug of silica gel and chromatographedthrough a silica gel column, eluting with a gradient of 0% to 40% EtOAcin hexane, to provide methyl 5-((triethylsilyl)ethynyl)picolinate (1.68g, 6.09 mmol, 88% yield). MS m/z [M+H]⁺=276.0. Calculated fromC₁₅H₂₁NO₂Si: 275.418

Step 2: 5-Ethynylpicolinic acid

To a solution of methyl 5-((triethylsilyl)ethynyl)picolinate (1.68 g,6.05 mmol) in THF (12.11 ml) was added TBAF, 1.0M in THF (6.68 ml, 6.68mmol, Sigma Aldrich). The reaction was allowed to stir for 6 hours atRT. The reaction was concentrated. The crude product was adsorbed onto aplug of silica gel and chromatographed through silica gel column elutingwith a gradient of 10% to 100% EtOAc in hexane followed by 1% AcOH inEtOAc, to afford 5-ethynylpicolinic acid (0.05 g, 0.37 mmol, 6.10%yield). MS m/z [M+H]⁺=147.9. Calculated from C₈H₅NO₂: 147.131

Intermediate 85

Synthesis of 5-(Prop-1-yn-1-yl)picolinic acid Step 1: Methyl5-bromopicolinate

To a suspension of 5-bromopicolinic acid (2.0 g, 9.94 mmol) in MeOH (2ml)/toluene (20 ml) was added TMS-diazomethane (20M in diethyl ether;5.47 ml, 10.94 mmol, Matrix Scientific) dropwise. The reaction wasstirred at room temperature for 3 hours. An additional 0.2 eq (0.99 mL)of TMS-diazomethane was added and the reaction stirred for 1.5 hours.The reaction was concentrated and the brown solid was carried to nextstep without further work up. MS m/z [M+H]=217.9. Calculated fromC₇H₆BrNO₂: 216.032

Step 2: Methyl 5-(prop-1-yn-1-yl)picolinate

To a solution of methyl 5-bromopicolinate (0.60 g, 2.77 mmol) in toluene(50 mL) was added tributyl(prop-1-yn-1-yl)stannane (1.01 mL, 3.32 mmol,Sigma Aldrich) and tetrakis(triphenylphosphine)palladium (0.04 g, 0.036mmol, Strem Chemicals, Inc.). The reaction was stirred overnight at 100°C. The reaction was allowed to cool to rt and concentrated. The residuewas adsorbed onto a plug of 10% w/w KF Silica and chromatographed with asilica gel column eluting with a gradient of 10% to 100% EtOAc inhexane, to provide methyl 5-(prop-1-yn-1-yl)picolinate (0.18, 1.05 mmol,37.8% yield). MS m/z [M+H]⁺=176.0. Calculated from C₁₀H₉NO₂: 175.184

Step 3: 5-(Prop-1-yn-1-yl)picolinic acid

To a solution of methyl 5-(prop-1-yn-1-yl)picolinate (0.18 g, 1.05 mmol)in tetrahydrofuran (3.48 ml) was added sodium hydroxide 1.0 N solution(1.05 mL, 1.045 mmol, Sigma). The reaction was stirred for 1.5 hours atroom temperature. Hydrogen chloride (4.0M solution in 1,4-dioxane; 0.26ml, 1.05 mmol, Sigma Aldrich) was added and the reaction stirred for anadditional 10 minutes. The reaction was concentrated in vacuo to provide5-(prop-1-yn-1-yl)picolinic acid as a light yellow solid. The materialwas used without further purification assuming theoretical yield. MS m/z[M+H]=162.1. Calculated from C₉H₇NO₂: 161.157

Intermediate 86

Synthesis of 5-chloro-3-(fluoromethyl)picolinic acid Step 1: Methyl5-chloro-2-vinylnicotinate

A sealable vial was charged with methyl 2,5-dichloronicotinate (100 mg,0.49 mmol, Bionet Research), tributyl(vinyl)stannane (156 μl, 0.53 mmol)and N,N-dimethylformamide (1 mL) at RT under nitrogen atmosphere.2,6-Ditert-butyl-4-methylphenol (Aldrich, 5 mg) was added, followed bydichlorobis(triphenylphosphine)palladium(II) (Strem, 68 mg, 0.10 mmol)and the reaction mixture was heated to 80° C. for 1 hour. The reactionmixture was cooled to RT and partitioned between EtOAc (50 mL) and water(50 The organic phase was separated and washed with water (2×25 mL) andbrine (30 mL). The combined organic layers were dried over anhydrousmagnesium sulfate and the filtrate was concentrated under reducedpressure. The crude product was purified by flash chromatography onsilica gel (5-35% EtOAc/hexanes) to obtain the title compound as acolorless oil (96 mg).

¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 3.95 (s, 3H) 3.97-4.00 (m, 1H)5.55-5.69 (m, 1H) 6.43-6.58 (m, 1H) 7.51-7.67 (m, 1H) 8.12-8.23 (m, 1H)8.59-8.69 (m, 1H)

Step 2: (5-Chloro-2-vinylpyridin-3-yl)methanol

A solution of methyl 5-chloro-2-vinylnicotinate (0.21 g, 1.06 mmol) inDCM (5 ml) was cooled to −45° C. A solution of diisobutylaluminumhydride (1M in hexane, 1.6 ml, 1.59 mmol, Aldrich) was added dropwise.After 15 min, the reaction mixture was quenched by the addition of asaturated aqueous solution of potassium sodium tartrate (3 mL). DCM wasadded, followed by water. The organic phase was separated, washed withwater and dried over MgSO₄. The filtrate was concentrated under reducedpressure. The crude material was absorbed onto a plug of silica gel andpurified by chromatography, eluting with a gradient of 5% to 55% EtOAcin hexane, to provide the title compound (77 mg) as a white solid. LC/MSm/z=170.1 [M+H]⁺.

Step 3: 5-Chloro-3-(fluoromethyl)-2-vinvlpyridine

To a solution of triethylamine trihydrofluoride (Aldrich, 1.9 mL, 12mmol) in DCM (30 mL) at −78° C., was added Xtalfluor-E (4.1 g, 18 mmol,Aldrich), followed by a solution of(5-chloro-2-vinylpyridin-3-yl)methanol (2 g, 12 mmol) in DCM (40 mL).The cold bath was removed and the reaction mixture was allowed to warmfrom −78° C. to rt over a period of 15 min. The reaction was quenched bythe addition of aqueous saturated bicarbonate solution. After 15 minstirring at rt, the reaction mixture was diluted with EtOAc and water.The organic phase was separated and dried over MgSO₄. The filtrate wasabsorbed onto a plug of silica gel and purified by chromatographythrough, eluting with a gradient of 5% to 45% EtOAc in hexane, toprovide the title compound as colorless oil (1.22 g). LC/MS m/z=172.1[M+H]⁺.

Step 4: 5-chloro-3-(fluoromethyl)picolinaldehyde

To a solution of 5-chloro-3-(fluoromethyl)-2-vinylpyridine (65 mg, 0.38mmol) in THF (2.3 mL) and water (3.5 mL) was added a solution of osmiumtetroxide (2.5 wt % in 2-methyl-2-propanol, 80 μl, 0.038 mmol, Aldrich).After 5 min, sodium meta-periodate (122 mg, 0.568 mmol, Aldrich) wasadded in one portion and the reaction mixture was allowed to stir for 1h. The reaction mixture was partitioned between brine and EtOAc. Theorganic phase was separated and dried over MgSO₄. The filtrate wasabsorbed onto a plug of silica gel and purified by chromatography,eluting with a gradient of 5% to 45% EtOAc in hexane, to provide thetitle compound as grey solid (55 mg).

¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 5.81 (s, 1H) 5.97 (s, 1H) 8.02-8.21(m, 1H) 8.63-8.82 (m, 1H) 10.03-10.19 (m, 1H)

Step 5: 5-chloro-3-(fluoromethyl)picolinic acid

To a solution of 5-chloro-3-(fluoromethyl)picolinaldehyde (55 mg, 0.32mmol) in THF (2 mL) and water (4 mL) was added solid NaOH (13 mg) at 0°C. After 10 min, KMNO₄ (100 mg) was added in one portion. Afteradditional 10 min, the reaction mixture was filtered through a pad ofcelite. The celite was washed with 1 M HCl (10 mL), water and EtOAc. Thephases were separated and the aqueous phase was extracted with EtOAc.The combined organic layers were dried over MgSO₄ and the filtrate wasconcentrated under reduced pressure. The title compound was obtained asa yellow residue and taken onto the next step without furtherpurification. LC/MS m/z=172.1 [M+H]⁺.

Intermediate 87

Synthesis of 6-chlorofuro[3,2-b]pyridin-3(2H)-one Step 1: ethyl2-((5-chloro-2-cyanopyridin-3-yl)oxy)acetate

To a mixture of cesium carbonate (1.63 g, 5.01 mmol) and5-chloro-3-fluoropicolinonitrile (0.784 g, 5.01 mmol) was added NMP (5mL) and ethyl glycolate (0.52 mL, 5.49 mmol). The reaction mixture wasstirred at RT for 20 min, heated to 80° C. for 1 h and additional ethylglycolate (0.10 mL) was added. Stirring was continued at 80° C. for 2 hand the reaction mixture was cooled to RT. The reaction was and dilutedwith EtOAc and water. The aqueous phase was extracted with EtOAc (2×)and the combined organic extracts were washed with brine (1×), driedover MgSO₄, filtered, and concentrated. Purification by flash columnchromatography on silica gel eluthing with a gradient of 0% to 15% EtOAcin DCM gave ethyl 2-((5-chloro-2-cyanopyridin-3-yl)oxy)acetate (0.83 g,3.46 mmol, 69% yield) as a white solid. LC/MS (ESI⁺) m/z=240.9 (M+H).Calculated for C₁₀H₉ClN₂O₃ 240.0.

Step 2: ethyl 3-amino-6-chlorofuro[3,2-b]pyridine-2-carboxylate

The HCl salt of ethyl 2-((5-chloro-2-cyanopyridin-3-yl)oxy)acetate wasformed by the addition of HCl (4 M in dioxane, 6.0 mL), 24 mmol) to asolution of ethyl 24(5-chloro-2-cyanopyridin-3-yl)oxy)acetate in EtOH(15 mL). The solution was concentrated under reduced pressure. To asuspension of sodium hydride (60 wt % dispersion in mineral oil, 0.60 g,14.9 mmol) in PhMe (45 mL) at RT was added ethanol (0.88 mL, 15.00mmol). The mixture was stirred at room temperature for 20 min and addedvia cannula to ethyl 2-((5-chloro-2-cyanopyridin-3-yl)oxy) acetatehydrochloride (1.27 g, 4.58 mmol). The reaction mixture was stirred atRT for 40 min and quenched with saturated NH₄Cl. The reaction mixturewas diluted with EtOAc and water. The aqueous phase was extracted withEtOAc (2×) and the combined organic extracts were washed with brine(1×), dried over MgSO₄, filtered, and concentrated to give ethyl3-amino-6-chlorofuro[3,2-b]pyridine-2-carboxylate (0.84 g, 3.47 mmol,76% yield) as a yellow solid which was used without furtherpurification. LC/MS (ESI) m/z=240.9 (M+H). Calculated for C₁₀H₉ClN₂O₃240.0.

Step 3: 6-chlorofuro[3,2-b]pyridin-3(2H)-one

A solution of ethyl 3-amino-6-chlorofuro[3,2-b]pyridine-2-carboxylate(0.81 g, 3.35 mmol) in hydrochloric acid (5.0 M in water, 50.0 mL, 3.35mmol) was heated to reflux for 4 h and cooled to RT. The pH was adjustedto 7 with saturated NaHCO₃. The aqueous phase was extracted with EtOAc(3×) and the combined organic extracts were dried over MgSO₄, filtered,and concentrated. Purification by flash column chromatography on silicagel eluting with a gradient of 0% to 100% EtOAc in DCM gave6-chlorofuro[3,2-b]pyridin-3(2H)-one (0.12 g, 0.68 mmol, 20% yield) as ayellow solid. LC/MS (ESI⁺) m/z=170.0 (M+H). Calculated for C₇H₄ClNO₂169.0.

Intermediate 88

Synthesis of 3-bromo-6,7-dihydroquinolin-8(5H)-one Step 1:(E)-8-benzylidene-3-bromo-5,6,7,8-tetrahydroquinoline

To a mixture of 3-bromo-5,6,7,8-tetrahydroquinoline (0.58 g, 2.73 mmol)(prepared according to: J. Am. Chem. Soc. 2011, 133, 12285) andpotassium acetate (2.94 g, 30.0 mmol) in acetic acid (9.50 mL, 165 mmol)in a pressure tube was added benzaldehyde (2.80 mL, 27.7 mmol). Thereaction mixture was heated to 150° C. (oil bath temperature) for 8 dand cooled to room temperature. The reaction was diluted with EtOAc andwashed with 5 M NaOH (1×), water (1×), brine (1×), dried over MgSO₄,filtered, and concentrated. Purification by flash column chromatographyon silica gel eluting with a gradient of 0% to 10% EtOAc in heptane gave1.29 g of a 2.5:1 mixture of(E)-8-benzylidene-3-bromo-5,6,7,8-tetrahydroquinoline (1.29 g, 4.30mmol) and benzaldehyde as a yellow oil that was used without furtherpurification. LC/MS (ESI⁺) m/z=300.0 (M+H). Calculated for C₁₆H₁₄BrN299.0.

Step 2: 3-bromo-6,7-dihydroquinolin-8(5H)-one

A solution of (E)-8-benzylidene-3-bromo-5,6,7,8-tetrahydroquinoline(0.82 g, 2.5:1 mixture with benzaldehyde) in MeOH (40 mL) and DCM (40mL) was cooled to −78° C. and ozone was bubbled through the solution for5 min until the solution turned light blue. Oxygen was passed throughthe solution for 10 min until the solution turned colorless andtriphenylphosphine (1.03 g, 3.93 mmol) was added. The solution wasremoved from the dry ice/acetone bath and allowed to warm to RT. Thereaction mixture was stirred at RT for 1 h. The reaction mixture wasconcentrated. Purification by flash column chromatography on silica geleluting with 30% to 70% EtOAc in heptane) gave3-bromo-6,7-dihydroquinolin-8(5H)-one (0.460 g, 2.04 mmol, 75% yield) asa white solid. LC/MS (ESI⁺) m/z=225.9 (M+H). Calculated for C₉H₈BrNO225.0.

Intermediate 89

Synthesis of 3-Methylenecyclobutanecarbaldehyde Step 1:N-methoxy-N-methyl-3-methylenecyclobutanecarboxamide

To a solution of 3-methylenecyclobutanecarboxylic acid (525 mg, 4.68mmol, Frontiers Scientific Services) in DMF (5 mL, aldrich) was added asolution of N,O-dimethyl hydroxylamine hydrochloride (0.55 g, 5.62 mmol,Aldrich) and triethylamine (0.78 mL, 5.62 mmol, Aldrich) in DMF (5 mL,Aldrich). The reaction was cooled to 0° C. and propylphosphonicanhydride solution (50 wt. % in DMF; 4.47 mL, 7.02 mmol, Alfa Aesar) wasadded. The reaction was stirred at RT for 16 h. The reaction wasquenched with saturated NaHCO₃ (10 mL) and stirred at RT for 5 min. Thereaction was extracted with EtOAc (2×30 mL) and the combined organicextracts were washed with saturated ammonium chloride (2×40 mL), driedover MgSO₄, and concentrated. The residue was dissolved in diethyl ether(5 mL) and the solution mixture was washed with H₂O (2×10 mL), driedover MgSO₄, concentrated, and dried in vacuo to give 398 mg of the titlecompound as a light yellow liquid. MS (ESI, positive ion) m/z: 156.1(M+H).

Step 2: 3-Methylenecyclobutanecarbaldehyde

To a solution of N-methoxy-N-methyl-3-methylenecyclobutanecarboxamide(0.11 g, 0.71 mmol) in diethyl ether (2 mL, Aldrich) at 0° C. underAr(g) was added lithium aluminium hydride (1.0 M solution in THF; 0.851mL, 0.851 mmol, Aldrich) dropwise. After completed addition, thereaction was stirred at 0° C. for 45 min. The reaction was quenched witha solution of KHSO₄ (1M, aq) at 0° C. and gradually warmed to roomtemperature and stirred for 30 min. The reaction was extracted withdiethyl ether (2×10 mL) and the combined organic extracts were driedover MgSO₄, concentrated, and dried in vacuo to afford 68 mg of thetitle compound as a light yellow liquid, which was used directly in thenext step without further purification. 1H NMR (CHLOROFORM-d) δ: 9.79(d, J=2.3 Hz, 1H), 4.68-4.80 (m, 2H), 3.08-3.24 (m, 1H), 2.84-3.02 (m,4H).

Intermediate 90

Synthesis of 1-(Trifluoromethyl)cyclopropanecarbaldehyde Step 1:N-methoxy-N-methyl-1-(trifluoromethyl)cyclopropanecarboxamide

To a solution of N,O-dimethyl hydroxylamine hydrochloride (0.48 g, 4.87mmol, Aldrich) in DMF (15 mL, Aldrich) was added triethylamine (0.68 mL,4.87 mmol, Aldrich). After completed addition the reaction was stirredat RT for 5 min. 1-trifluoromethylcyclopropane-1-carboxylic acid (0.5 g,3.24 mmol, Alfa Aesar, A Johnson Matthey Company) was added and thereaction was stirred at room temperature for 1 min. The reaction wascooled to 0° C. and propylphosphonic anhydride solution (50 wt. % inDMF; 3.10 mL, 4.87 mmol, Acros Organics) was added dropwise. Theresulting mixture was stirred at room temperature for 5 days. Thereaction was quenched with saturated NaHCO₃ and stirred at RT for 5 min.The reaction was extracted with diethyl ether (2×40 mL) and the combinedorganic extracts were washed with saturated ammonium chloride, water,dried over MgSO₄, and concentrated to give 229 mg of the title compoundas a light yellow liquid. MS (ESI, positive ion) m/z: 198.1 (M+H).

Step 2: 1-(Trifluoromethyl)cyclopropanecarbaldehyde

To a solution ofN-methoxy-N-methyl-1-(trifluoromethyl)cyclopropanecarboxamide (0.23 g,1.162 mmol) in diethyl ether (3 mL, aldrich) at 0° C. under Ar(g) wasadded lithium aluminium hydride (1.0 M solution in THF; 1.39 mL, 1.39mmol, aldrich) dropwise. After completed addition the reaction was thenstirred at 0° C. for 45 min. The reaction was quenched with a solutionof KHSO₄ (1M) at −78° C. and gradually warmed to RT and stirred for 30min. The reaction was extracted with diethyl ether (2×10 mL). Thecombined organic extracts were dried over MgSO₄, concentrated, and driedin vacuo to afford 62 mg of the title compound as a light yellow liquid,which was used in the next step without further purification. 1H NMR(CHLOROFORM-d) δ: 9.69 (s, 1H), 1.43 (m, 2H), 1.21 (t, J=7.0 Hz, 2H)

Intermediate 91

Synthesis of 4-chloro-7-(trifluoromethyl)pyrido[3,2-d]pyrimidine Step 1:3-nitro-5-(trifluoromethyl)picolinonitrile

A microwave reaction vial was charged with2-chloro-3-nitro-5-(trifluoromethyl)pyridine (2 g, 8.83 mmol), NMP (4.41ml) and CuCN (0.830 g, 9.27 mmol). The vial was sealed and the mixturewas irradiated in the MW at 175° C. for 15 min. Upon cooling to RT, thereaction mixture was poured onto ice and EtOAc was added. The mixturewas filtered through Celite, washing with EtOAc and a small amount ofMeOH. The layers of the filtrate were separated, and the aqueous portionwas extracted again with EtOAc. The combined organic portions were driedwith sodium sulfate, filtered and concentrated. The crude material waspurified by silica gel chromatography, using a gradient of 0-30% EtOAcin heptane to provide 3-nitro-5-(trifluoromethyl)picolinonitrile (645mg, 2.97 mmol, 33.7% yield) as a yellow oil that solidified uponstanding. LC/MS (ESI⁺) m/z=218.1 (M+H).

Step 2: 3-nitro-5-(trifluoromethyl)picolinamide

A round bottom flask was charged with3-nitro-5-(trifluoromethyl)picolinonitrile (910 mg, 4.19 mmol) andsulfuric acid (4192 μl, 4.19 mmol), and the mixture was stirred at 60°C. for 16 h. Upon cooling to RT the crude mixture was poured onto ice,and the resulting solids were filtered, washed with water and dried.3-nitro-5-(trifluoromethyl)picolinamide (850 mg, 3.62 mmol, 86% yield)was isolated as a light yellow solid. LC/MS (ESI⁺) m/z=236.1 (M+H).

Step 3: 3-amino-5-(trifluoromethyl)picolinamide

A round bottom flask was charged with3-nitro-5-(trifluoromethyl)picolinamide (850 mg, 3.62 mmol) and wet 5wt. % Pd/C (769 mg, 0.362 mmol) and was purged with nitrogen. EtOAc(7230 μl) and then MeOH (7230 μl) were added, and the flask wasevacuated and filled with hydrogen. The reaction was stirred at RT underhydrogen atmosphere for 17 h. The mixture was filtered through Celiteand washed with EtOAc and MeOH. The filtrate was concentrated to provide3-amino-5-(trifluoromethyl)picolinamide (720 mg, 3.51 mmol, 97% yield)as a white solid. LC/MS (ESI⁺) m/z=206.1 (M+H).

Step 4: 7-(trifluoromethyl)pyrido[3,2-d]pyrimidin-4(3H)-one

A vial was charged with 3-amino-5-(trifluoromethyl)picolinamide (615 mg,3.00 mmol) and triethyl orthoformate (2496 μl, 14.99 mmol). The vial wassealed and the mixture was heated at 120° C. for 17 h. Upon cooling, theheterogeneous mixture was filtered and the solids were washed withheptane. 7-(trifluoromethyl)pyrido[3,2-d]pyrimidin-4(3H)-one (540 mg,2.51 mmol, 84% yield) was isolated as a tan solid. LC/MS (ESI⁺)m/z=216.0 (M+H).

Step 5: 4-chloro-7-(trifluoromethyl)pyrido[3,2-d]pyrimidine

A pressure bottle was charged with7-(trifluoromethyl)pyrido[3,2-d]pyrimidin-4(3H)-one (540 mg, 2.51 mmol),toluene (10.000 mL) and Hunig's base (1.315 mL, 7.53 mmol). POCl₃ (0.702mL, 7.53 mmol) was added, and the bottle was sealed. The mixture washeated to 115° C. for 4 h. After cooling to RT, the mixture was dilutedwith EtOAc and water, and the layers were separated. The aqueous portionwas extracted with additional EtOAc, and the combined organic portionswere washed with saturated sodium bicarbonate, dried over sodiumsulfate, filtered and concentrated.4-chloro-7-(trifluoromethyl)pyrido[3,2-d]pyrimidine (560 mg, 2.397 mmol,96% yield) was isolated as a brown solid. LC/MS (ESI⁺) m/z=234.0 (M+H).

Methods to Synthesize Final Compounds General Amidation Procedures:

The following four (4) methods were used to couple the aniline coreintermediates to desired acid intermediates or other intermediates aspresented herein, to prepare the final compounds of the invention.

Method A Triphenylphosphine (T₃P) Procedure Example 28 Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-methoxypicolinamide

A solution of 1-propanephosphonic acid cyclic anhydride (50 wt % inEtOAc, 0.352 ml, 0.553 mmol) was added to a solution of(1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16g-B, 0.075 g, 0.277 mmol) and 5-chloro-3-methoxypicolinic acid (0.062g, 0.332 mmol) in EtOAC (2 mL) at room temperature. The reaction mixturewas stirred at rt for 12 h, diluted with aqueous saturated NaHCO₃solution and extracted with EtOAC. The organic phase dried over MgSO₄and the filtrate was concentrated under reduced pressure. The residuewas purified by silica gel chromatography using (0-100% EtOAc/heptane)to give the title compound (0.082 g, 0.186 mmol, 67.3% yield). MSm/z=441.1 [M+H]⁺

1H NMR (400 MHz, DMSO-d6) δ ppm 10.51 (s, 1H), 8.26 (d, J=1.76 Hz, 1H),7.71-7.91 (m, 3H), 7.20 (dd, J=11.64, 9.29 Hz, 1H), 5.99-6.37 (m, 1H),5.86 (s, 2H), 3.98 (t, J=5.38 Hz, 1H), 3.89 (s, 3H), 1.63-1.76 (m, 1H),1.12 (br. s., 1H), 0.82-0.96 (m, 1H)

Method B DMTMM Procedure Example 29 Synthesis ofN-(3-([1(R,S),5(S,R),6(R,S)]-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-((4-hydroxy-4-methylpent-2-yn-1-yl)oxy)-3-methylpicolinamide

4-(4,6-Dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholin-4-ium chloride(32.3 mg, 0.117 mmol) was added to a stirring solution of[1(S,R),5(S,R),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(1k-rac) (1k rac, 25 mg, 0.106 mmol), and5-((4-hydroxy-4-methylpent-2-yn-1-yl)oxy)-3-methylpicolinic acid(intermediate 38, 27.8 mg, 0.112 mmol) in THF (1 mL) and MeOH (0.250mL). The reaction mixture was stirred at RT for 2.5 hrs. The reactionmixture was concentrated under reduced pressure and the residue waspurified via silica gel flash column chromatography eluting with 0 to10% (2 M NH₃ in MeOH) in DCM to yield the title compound as a whitesolid. MS m/z=467.1 [M+H]⁺

1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.84 (dt, J=9.63, 6.63 Hz, 1H) 0.97(td, J=6.90, 2.64 Hz, 1H) 1.51 (s, 6H) 1.64 (s, 3H) 1.74-1.83 (m, 1H)2.76 (s, 3H) 3.31 (br. s., 3H) 3.89-3.96 (m, 1H) 4.78 (s, 2H) 7.04 (dd,J=11.54, 8.80 Hz, 1H) 7.13 (d, J=2.74 Hz, 1H) 7.41 (dd, J=7.14, 2.64 Hz,1H) 7.90-7.96 (m, 1H) 8.10 (d, J=2.74 Hz, 1H) 9.98 (s, 1H)

Method C DMTMM Procedure Followed by Deprotection of Benzoyl GroupExample 30 Synthesis ofN-(3-([(1R,S),(5S,R),(6R,S)]-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5-methylphenyl)-5-chloropicolinamide

A solution ofN-(((1R,S),(5S,R),(6R,S))-5-(5-amino-2-fluoro-3-methylphenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(21d-rac, 220 mg, 0.565 mmol) and 5-chloro-2-pyridinecarboxylic acid(134 mg, 0.848 mmol) in THF (1983 μl)/MeOH (9910 was cooled to 0° C.before adding 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholiniumchloride (258 mg, 0.876 mmol). The reaction mixture was stirred at 0° C.for 15 minutes and then overnight at RT. The reaction was quenched withsaturated sodium bicarbonate solution and diluted with water and EtOAc.The organic layer was washed with brine, dried over magnesium sulfateand the filtrate was concentrated under reduced pressure. The cruderesidue was taken up in MeOH (3 mL) and1,8-diazabicyclo-[5.4.0]undec-7-ene (186 μl, 1.243 mmol) was added. Thereaction mixture was heated to 50° C. for 6 hours and additional 12 h atrt. The precipitate was filtered off, suspended in water (5 mL) and MeOH(2 mL) and stirred vigorously for 10 minutes. The solid was filtered anddried under high vac to afford the title compound (155.6 mg, 0.366 mmol,64.8% yield) as a white solid. MS m/z=424.9 [M+H]⁺

1H NMR (300 MHz, DMSO-d6) δ ppm 0.82-0.99 (m, 1H) 1.07-1.22 (m, 1H)1.63-1.81 (m, 1H) 3.94-4.09 (m, 1H) 5.83 (s, 2H) 5.97-6.49 (m, 1H) 7.80(d, J=4.82 Hz, 2H) 8.08-8.26 (m, 2H) 8.78 (d, J=1.61 Hz, 1H) 10.56 (s,1H)

Method D HATU procedure Example 31 Synthesis of N-(3-([(1R,S), (5 S,R),(6R,S)]-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoro-4-methoxyphenyl)-5-chloropicolinamide

To a solution of [(1R,S), (5S,R),(6R,S)]-5-(5-amino-3-fluoro-2-methoxyphenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(12b rac, 80 mg, 0.282 mmol) and 5-chloropicolinic acid (102 mg, 0.650mmol) in DMF (1 mL) was added1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium3-oxid hexafluorophosphate (247 mg, 0.650 mmol) anddiisopropylethylamine (0.196 mL, 1.130 mmol). The reaction mixture wasstirred at RT overnight and then quenched with aqueous, saturated NaHCO₃solution. The reaction mixture was extracted with DCM and dried overNa₂SO₄. The filtrate was concentrated under reduced pressure and theresidue was purified by flash column (DCM/EtOAc=4:1 to 3:1) to afford5-chloro-N-([(1R,S), (5S,R),(6R,S)]-5-(5-(5-chloropicolinamido)-3-fluoro-2-methoxyphenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)picolinamide(140 mg, 0.249 mmol). The product was dissolved 5 mL 2N NH₃/MeOH andheated to 60° C. overnight. The reaction mixture was cooled to rt, thesolvent was evaporated under reduced pressure and the residue waspurified by flash column (EtOAc/DCM=1:2 to 1:1 to EtOAc) to give thetitle compound as a light yellow solid (90 mg, 0.213 mmol, 75% yield).MS m/z=422.9 [M+H]⁺

1H NMR (400 MHz, CHLOROFORM-d) δ ppm=9.79 (br. s., 1H), 8.55 (s, 1H),8.22 (d, J=8.4 Hz, 1H), 8.01 (d, J=13.5 Hz, 1H), 7.87 (d, J=8.6 Hz, 1H),7.24 (br. s., 1H), 4.97-4.58 (m, 2H), 4.00 (s, 3H), 3.95 (br. s., 1H),1.79 (q, J=7.7 Hz, 1H), 1.20-1.11 (m, 1H), 0.96-0.84 (m, 1H)

Examples 32-293

Using procedures analogous or similar to one of the general amidationprocedures A-D described above, the appropriate aniline and carboxylicacid intermediates were reacted to provide the examples listed in Table1.

TABLE 1 Ex- ample Meth- # od Compound Name Structure Analytical Data 32D N-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-chloropicolinamide

MS m/z = 410.8 [M]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ 9.59-9.79 (m, 1H),8.48 (s, 1H), 8.11-8.23 (m, 1H), 7.96-8.07 (m, 1H), 7.86 (d, J = 8.41Hz, 1H), 7.26 (br. s., 1H), 4.70-4.84 (m, 2H), 4.44-4.70 (m, 2H), 3.94(br. s., 1H), 1.71 (br. s., 1H), 1.22 (br. s., 1H), 0.77-1.01 (m, 1H) 33A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine- 2-carboxamide

MS m/z = 432.1 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 10.73 (s, 1 H),8.91 (d, J = 1.17 Hz, 1 H), 8.49 (s, 1 H), 7.97 (ddd, J = 12.47, 6.80,2.45 Hz, 1 H), 7.81- 7.92 (m, 1 H), 5.66 (s, 2 H), 5.14 (d, J = 2.35 Hz,2 H), 4.32-4.82 (m, 2 H), 4.00-4.15 (m, 1 H), 3.64 (t, J = 2.35 Hz, 1H), 1.47-1.70 (m, 1 H), 0.99 (td, J = 6.50, 2.64 Hz, 1 H), 0.86 (dt, J =9.49, 6.41 Hz, 1 H) 34 A N-(3-((1S,5S,6S)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine- 2-carboxamide

MS m/z = 432.1 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 10.73 (s, 1 H),8.91 (d, J = 1.17 Hz, 1 H), 8.49 (d, J = 1.17 Hz, 1 H), 7.97 (ddd, J =12.32, 6.85, 2.54 Hz, 1 H), 7.82-7.91 (m, 1 H), 5.66 (s, 2 H), 5.14 (d,J = 2.35 Hz, 2 H), 4.34-4.78 (m, 2 H), 3.97-4.17 (m, 1 H), 3.64 (d, J =4.89 Hz, 1 H), 1.46-1.66 (m, 1 H), 0.99 (td, J = 6.46, 2.74 Hz, 1 H),0.86 (dt, J = 9.49, 6.50 Hz, 1 H) 35 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5-(but- 2-yn-1-yloxy)pyrazine- 2-carboxamide

MS m/z = 446.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.49 (br.s., 1 H), 8.99 (s, 1 H), 8.17 (s, 1 H), 7.97-8.11 (m, 1 H), 7.26 (s, 1H), 5.04 (br. s., 2 H), 4.71-4.82 (m, 1 H), 4.57-4.69 (m, 1 H), 4.01(br. s., 1 H), 1.89 (br. s., 3 H), 1.77 (q, J = 7.89 Hz, 1 H), 1.24 (br.s., 1 H), 0.97 (q, J = 7.37 Hz, 1 H). 36 A N-(3-((1S,5S,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5-(but- 2-yn-1-yloxy)pyrazine- 2-carboxamide

MS m/z = 446.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.49 (br.s., 1 H), 8.99 (s, 1 H), 8.17 (s, 1 H), 7.97-8.11 (m, 1 H), 7.26 (s, 1H), 5.04 (br. s., 2 H), 4.71-4.82 (m, 1 H), 4.57-4.69 (m, 1 H), 4.01(br. s., 1 H), 1.89 (br. s., 3 H), 1.77 (q, J = 7.89 Hz, 1 H), 1.24 (br.s., 1 H), 0.97 (q, J = 7.37 Hz, 1 H). 37 N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5- cyanopicolinamide

MS m/z = 402.2 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.70 (br.s., 1 H), 8.82 (s, 1 H), 8.38 (s, 1 H), 8.19 (d, J = 8.02 Hz, 1 H),7.86-8.06 (m, 1 H), 7.26 (br. s., 1 H), 4.53-4.89 (m, 4 H), 3.95 (br.s., 1 H), 1.71 (q, J = 7.63 Hz, 1 H), 1.22 (br. s., 1 H), 0.93 (q, J =7.37 Hz, 1 H). 38 A N-(3-((1S,5S,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-cyanopicolinamide

MS m/z = 402 [M + H]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ 9.70 (br. s.,1H), 8.82 (s, 1H), 8.37 (d, J = 8.22 Hz, 1H), 8.19 (d, J = 8.02 Hz, 1H),7.95- 8.04 (m, 1H), 7.26 (br. s., 1 H), 4.55- 4.82 (m, 4H), 3.95 (br.s., 1H), 1.71 (q, J = 7.63 Hz, 1H), 1.22 (br. s., 1H), 0.93 (q, J = 7.37Hz, 1H). 39 A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-bromopicolinamide

MS m/z = 457 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.78 (br. s.,1 H), 8.62 (d, J = 1.96 Hz, 1 H), 8.14 (s, 1 H), 7.90-8.08 (m, 2 H),7.28 (d, J = 2.93 Hz, 1 H), 4.75 (s, 1 H), 4.63 (s, 1 H), 3.97 (t, J =6.16 Hz, 1 H), 1.63- 1.80 (m, 1 H), 1.21 (td, J = 6.94, 2.54 Hz, 1 H),0.93 (dt, J = 9.34, 6.87 Hz, 1 H) 40 A N-(3-((1S,5S,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5- bromopicolinamide

MS m/z = 457 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.76 (br. s.,1 H), 8.62 (d, J = 1.76 Hz, 1 H), 8.14 (s, 1 H), 7.97-8.07 (m, 2 H),7.27 (br. s., 1 H), 4.74 (s, 1 H), 4.62 (s, 1 H), 4.50 (br. s., 2 H),3.95 (t, J = 6.16 Hz, 1 H), 1.63-1.81 (m, 1 H), 1.20 (td, J = 6.85, 2.54Hz, 1 H), 0.84-0.98 (m, 1 H) 41 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5- methoxypicolinamide

MS m/z = 407.2 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.81 (s, 1H), 8.15-8.25 (m, 2 H), 8.06 (ddd, J = 11.83, 6.94, 2.54 Hz, 1 H), 7.32(dd, J = 8.61, 2.74 Hz, 1 H), 7.26 (s, 1 H), 4.51-4.90 (m, 2 H),3.96-4.03 (m, 1 H), 3.94 (s, 3 H), 1.65-1.81 (m, 1 H), 1.15-1.30 (m, 1H), 0.95 (dt, J = 9.49, 6.90 Hz, 1 H). NH2 is broad and not accountedfor. 42 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloro- 3-(methoxymethyl)picolin- amide

MS m/z = 455.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.86 (br.s., 1 H), 8.27 (br. s., 1 H), 8.17 (br. s., 1 H), 7.92 (d, J = 6.06 Hz,1 H), 7.49 (d, J = 6.26 Hz, 1 H), 7.00 (t, J = 10.07 Hz, 1 H), 6.03-6.42(m, 1 H), 4.85-5.14 (m, 4 H), 3.91 (br. s., 1 H), 3.54 (s, 3 H),1.83-1.96 (m, 1 H), 1.43 (br. s., 1 H), 0.95 (q, J = 7.30 Hz, 1 H) 43 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloro-3-methylpicolinamide

MS m/z = 425.2[M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.89 (s, 1H), 8.24 (s, 1 H), 7.87-8.04 (m, 1 H), 7.61 (s, 1 H), 7.48 (dd, J =6.65, 2.35 Hz, 1 H), 7.01 (dd, J = 11.35, 9.00 Hz, 1 H), 6.01-6.45 (m, 1H), 4.96 (br. s., 2 H), 3.92 (t, J = 5.67 Hz, 1 H), 2.75 (s, 3 H), 1.82-1.97 (m, 1 H), 1.35-1.53 (m, 1 H), 0.86-1.03 (m, 1 H) 44 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-cyano-3-methylpicolinamide

MS m/z = 416.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.86 (s, 1H), 8.54 (s, 1 H), 7.84-8.03 (m, 2 H), 7.49 (dd, J = 6.65, 2.54 Hz, 1H), 7.00 (dd, J = 11.35, 8.80 Hz, 1 H), 6.02-6.48 (m, 1 H), 4.99 (br.s., 2 H), 3.79-3.99 (m, 1 H), 2.82 (s, 3 H), 1.82-1.93 (m, 1 H), 1.43(t, J = 6.16 Hz, 1 H), 0.80-1.05 (m, 1 H) 45 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-cyano- 3-methoxypicolinamide

MS m/z = 432.2[M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.59 (br.s., 1 H), 8.34 (s, 1 H), 8.01 (d, J = 8.02 Hz, 1 H), 7.49-7.67 (m, 2 H),7.08 (t, J = 10.17 Hz, 1 H), 6.00- 6.49 (m, 1 H), 4.97 (br. s., 2 H),3.84- 4.00 (m, 4 H), 1.82-1.94 (m, 1 H), 1.42 (br. s., 1 H), 0.96 (q, J= 7.63 Hz, 1 H) 46 A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-4-chloro-1- (difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 450.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 8.45 (br.s., 1 H), 8.00 (ddd, J = 11.59, 6.99, 2.54 Hz, 1 H), 7.90 (s, 1 H), 7.25(s, 1 H), 7.11-7.18 (m, 1 H), 4.48-4.84 (m, 2 H), 3.95 (t, J = 6.26 Hz,1 H), 1.59- 1.82 (m, 1 H), 1.20 (td, J = 6.94, 2.54 Hz, 1 H), 0.76-0.99(m, 1 H). Note NH2 is broad from 5-3 ppm 47 A N-(3-((1S,5S,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-4- chloro-1- (difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 450.1 [M + H]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ 8.48 (br. s.,1H), 8.02 (dd, J = 6.94, 11.64 Hz, 1H), 8.01 (dd, J = 6.94, 11.64 Hz,1H), 7.90 (s, 1H), 7.10-7.16 (m, 1H), 4.56-4.79 (m, 2H), 3.96 (t, J =6.36 Hz, 1H), 1.68-1.76 (m, 1H), 1.21 (dt, J = 2.54, 6.85 Hz, 1H),0.88-0.97 (m, 1H) 48 D N-(3-((1S,5S,6S)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-4-chloro-1- (difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 410.8 [M]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ 8.48 (br. s., 1H),8.02 (dd, J = 6.94, 11.64 Hz, 1H), 8.01 (dd, J = 6.94, 11.64 Hz, 1H),7.90 (s, 1H), 7.10-7.16 (m, 1H), 4.56-4.79 (m, 2H), 3.96 (t, J = 6.36Hz, 1H), 1.68-1.76 (m, 1H), 1.21 (dt, J = 2.54, 6.85 Hz, 1H), 0.88-0.97(m, 1H) 49 A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-chloropicolinamide

MS m/z = 415.8 [M]]+ 1H NMR (400 MHz, CHLOROFORM-d) δ 9.70 (br. s., 1H),8.47 (s, 1H), 8.14-8.19 (m, J = 8.41 Hz, 1H), 7.95-8.02 (m, 1H),7.82-7.90 (m, J = 8.41 Hz, 1H), 7.26 (br. s., 1H), 4.49-4.92 (m, 4H),3.94 (br. s., 1H), 1.72 (q, J = 7.69 Hz, 1H), 1.22 (t, J = 6.46 Hz, 1H),0.91 (q, J = 7.37 Hz, 1H). 50 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5-cyano- 3-methylpicolinamide

MS m/z = 415.8 [M]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ 9.90 (br. s., 1H),8.63 (s, 1H), 7.99-8.07 (m, 1H), 7.94 (s, 1H), 7.14 (br. s., 1H), 4.56-4.81 (m, 4H), 3.95 (br. s., 1H), 2.84 (s, 3H), 1.73 (q, J = 7.96 Hz,1H), 1.11- 1.34 (m, 1H), 0.83-0.99 (m, 1H) 51 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5-cyano- 3-methylpicolinamide

MS m/z = 458.9 [M]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ 9.90 (br. s., 1H),8.63 (s, 1H), 7.99-8.07 (m, 1H), 7.94 (s, 1H), 7.14 (br. s., 1H), 4.56-4.81 (m, 4H), 3.95 (br. s., 1H), 2.84 (s, 3H), 1.73 (q, J = 7.96 Hz,1H), 1.11- 1.34 (m, 1H), 0.83-0.99 (m, 1H) 52 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-3- methyl-5- (trifluoromethyl)picolin- amide

MS m/z = 458.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ 9.91-10.10 (m, 1H),8.53-8.68 (m, 1H), 7.98-8.10 (m, 1H), 7.82-7.93 (m, 1H), 7.10-7.21 (m,1H), 4.26-5.17 (m, 3H), 3.74-4.08 (m, 1H), 2.86 (s, 4H), 1.57-1.91 (m,1H), 1.09-1.38 (m, 1H), 0.79-1.06 (m, 1H). 53 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-chloro- 3-methylpyrazine-2- carboxamide

MS m/z = 425.9[M]+ 1H NMR (300 MHz, CHLOROFORM-d) d ppm 9.52 (s, 1 H),8.25 (s, 1 H), 7.88-8.00 (m, 1 H), 7.45 (d, J = 4.97 Hz, 1 H), 6.89-7.06(m, 1 H), 5.97-6.50 (m, 1 H), 4.78- 5.40 (br. s., 2 H), 3.91 (br. s., 1H), 3.00 (s, 3 H), 1.81-1.96 (m, 1 H), 1.43 (br. s., 1 H), 0.84-1.05 (m,1 H) 54 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-6-chloro-3-methylpyrazine-2- carboxamide

MS m/z = 425.9 [M]+ 1H NMR (300 MHz, CHLOROFORM-d) δ 9.42 (s, 1H), 8.64(s, 1H), 7.93-8.01 (m, 1H), 7.51 (dd, J = 2.05, 6.43 Hz, 1H), 6.97-7.05(m, 1H), 6.42-6.05 (t, 1H), 4.92 (br. s., 2H), 3.93 (m, 1H), 3.00 (s,3H), 1.83- 1.93 (m, 1H), 1.39-1.47 (m, 1H), 0.92- 1.02 (m, 1H) 55 BN-(3- ([1(R,S),5(S,R),6(R,S)]- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropicolinamide

MS m/z = 411.0[M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.93-1.01(m, 1 H) 1.39-1.45 (m, 1 H) 1.83- 1.91 (m, 1 H) 3.91-3.97 (m, 1 H) 4.67(br. s., 2 H) 6.24 (t, J = 56.10 Hz, 1 H) 7.09 (dd, J = 11.54, 8.80 Hz,1 H) 7.64 (dd, J = 6.85, 2.74 Hz, 1 H) 7.87 (dd, J = 8.41, 2.35 Hz, 1 H)7.99 (ddd, J = 8.80, 4.11, 2.93 Hz, 1 H) 8.21 (d, J = 8.22 Hz, 1 H) 8.52(d, J = 2.15 Hz, 1 H) 9.79 (s, 1 H) 56 B N-(3-((1R,5S,6R)-3-amino-5-methyl-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(but-2- yn-1-yloxy)-3- methylpicolinamide

MS m/z = 422.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.89 (dt, J =9.59, 6.65 Hz, 1 H) 1.01 (td, J = 6.99, 2.64 Hz, 1 H) 1.68 (s, 3 H) 1.83(dt, J = 9.44, 7.31 Hz, 1 H) 1.88 (t, J = 2.25 Hz, 3 H) 2.78 (s, 3 H)3.96-4.01 (m, 1 H) 4.40 (br. s., 2 H) 4.75 (q, J = 2.20 Hz, 2 H) 7.04(dd, J = 11.64, 8.90 Hz, 1 H) 7.14 (d, J = 2.54 Hz, 1 H) 7.44 (dd, J =7.14, 2.64 Hz, 1 H) 7.92 (ddd, J = 8.71, 4.11, 2.84 Hz, 1 H) 8.14 (d, J= 2.74 Hz, 1 H) 10.01 (s, 1 H) 57 B N-(3-((1S,5R,6S)-3-amino-5-methyl-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(but-2- yn-1-yloxy)-3- methylpicolinamide

MS m/z = 422.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.88 (dt, J =9.73, 6.48 Hz, 1 H) 1.00 (td, J = 6.90, 2.64 Hz, 1 H) 1.67 (s, 3 H) 1.81(dt, J = 9.98, 7.30 Hz, 1 H) 1.88 (t, J = 2.35 Hz, 3 H) 2.78 (s, 3 H)3.97 (ddd, J = 7.48, 6.11, 2.64 Hz, 1 H) 4.09 (br. s., 2 H) 4.75 (q, J =2.35 Hz, 2 H) 7.04 (dd, J = 11.74, 8.80 Hz, 1 H) 7.14 (d, J = 2.54 Hz, 1H) 7.43 (dd, J = 7.04, 2.74 Hz, 1 H) 7.92 (ddd, J = 8.80, 4.11, 2.74 Hz,1 H) 8.14 (d, J = 2.74 Hz, 1 H) 10.00 (s, 1 H) 58 B N-(3-([1(R,S),5(S,R),6(R,S)]- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- methoxy-3-methylpyrazine-2- carboxamide

MS m/z = 422.0[M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (dt, J =9.34, 6.48 Hz, 1 H) 1.12-1.18 (m, 1 H) 1.70-1.77 (m, 1 H) 2.76 (s, 3 H)3.97-4.05 (m, 1 H) 4.00 (s, 3 H) 5.86 (s, 2 H) 6.19 (t, J = 56.10 Hz, 1H) 7.20 (dd, J = 11.74, 8.80 Hz, 1 H) 7.82-7.87 (m, 1 H) 7.90 (dd, J =7.04, 2.54 Hz, 1 H) 8.24 (s, 1 H) 10.45 (s, 1 H) 59 B N-(3-([1(R,S),5(S,R),6(R,S)]- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-cyanopicolinamide compound

MS m/z = 401.9[M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (dt, J = 9.34,6.48 Hz, 1 H) 1.13-1.19 (m, 1 H) 1.74 (dt, J = 9.29, 7.09 Hz, 1 H)4.00-4.06 (m, 1 H) 5.86 (s, 2 H) 6.20 (t, J = 55.90 Hz, 1 H) 7.24 (dd, J= 11.74, 8.80 Hz, 1 H) 7.89 (ddd, J = 8.80, 4.11, 2.93 Hz, 1 H) 8.06(dd, J = 7.04, 2.74 Hz, 1 H) 8.29 (dd, J = 8.22, 0.59 Hz, 1 H) 8.58 (dd,J = 8.22, 1.96 Hz, 1 H) 9.20 (dd, J = 2.00, 0.78 Hz, 1 H) 10.86 (s, 1 H)60 B N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropicolinamide

MS m/z = 410.9[M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.91-0.99 (m, 1H) 1.40-1.46 (m, 1 H) 1.87 (dt, J = 9.44, 7.12 Hz, 1 H) 3.89-3.95 (m, 1H) 4.85 (br. s., 2 H) 6.24 (t, J = 55.80 Hz, 1 H) 7.04 (dd, J = 11.54,8.80 Hz, 1 H) 7.62 (dd, J = 6.65, 2.74 Hz, 1 H) 7.85 (dd, J = 8.41, 2.35Hz, 1 H) 7.94 (ddd, J = 8.75, 4.16, 2.74 Hz, 1 H) 8.17 (d, J = 8.22 Hz,1 H) 8.45 (d, J = 2.15 Hz, 1 H) 9.71 (s, 1 H) 61 B N-(3-([1(R,S),5(S,R),6(R,S)]- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-6-chloro-3-methylimidazo[1,2- a]pyridine-2- carboxamide

MS m/z = 463.9[M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.86-0.98 (m, 1 H)1.12-1.19 (m, 1 H) 1.73 (q, J = 7.56 Hz, 1 H) 2.81 (s, 3 H) 3.99-4.07(m, 1 H) 5.85 (br. s., 2 H) 6.19 (t, J = 56.10 Hz, 1 H) 7.18 (dd, J =11.15, 9.39 Hz, 1 H) 7.42 (d, J = 9.39 Hz, 1 H) 7.69 (d, J = 9.59 Hz, 1H) 7.84-7.91 (m, 1 H) 7.96-8.02 (m, 1 H) 8.68 (s, 1 H) 10.24 (s, 1 H) 62B N-(3- ([1(R,S),5(S,R),6(R,S)]- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-chloro-5-cyanopicolinamide

MS m/z = 435.8 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.90 (dt, J =9.15, 6.48 Hz, 1 H) 1.09-1.15 (m, 1 H) 1.66-1.75 (m, 1 H) 3.95-4.00 (m,1 H) 5.93 (s, 2 H) 6.19 (t, J = 55.80 Hz, 1 H) 7.25 (dd, J = 11.74, 8.80Hz, 1 H) 7.75 (dd, J = 6.94, 2.64 Hz, 1 H) 7.80-7.85 (m, 1 H) 8.81 (d, J= 1.76 Hz, 1 H) 9.11 (d, J = 1.76 Hz, 1 H) 10.95 (s, 1 H) 63 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- methoxy-3-methylpyrazine-2- carboxamide

MS m/z = 422.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.95 (q, J= 7.70 Hz, 1 H) 1.37-1.44 (m, 1 H) 1.86 (q, J = 7.76 Hz, 1 H) 2.91 (s, 3H) 3.89-3.95 (m, 1 H) 4.04 (s, 3 H) 4.64 (br. s., 2 H) 6.22 (t, J =55.80 Hz, 1 H) 7.05 (t, J = 10.30 Hz, 1 H) 7.48 (d, J = 6.26 Hz, 1 H)7.91 (s, 1 H) 7.97- 8.03 (m, 1 H) 9.70 (s, 1 H) 64 B N-(3-((1S,5R,6S)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- methoxy-3- methylpyrazine-2- carboxamide

MS m/z = 422.1 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.95 (q, J= 7.56 Hz, 1 H) 1.37-1.45 (m, 1 H) 1.86 (q, J = 7.56 Hz, 1 H) 2.91 (s, 3H) 3.88-3.95 (m, 1 H) 4.04 (s, 3 H) 4.67 (br. s., 2 H) 6.22 (t, J =55.90 Hz, 1 H) 7.04 (t, J = 10.60 Hz, 1 H) 7.48 (d, J = 6.26 Hz, 1 H)7.90 (s, 1 H) 7.97- 8.03 (m, 1 H) 9.69 (s, 1 H) 65 B N-(3-((1S,5R,6S)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- cyanopicolinamide

MS m/z = 402.0 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (dt, J =9.39, 6.46 Hz, 1 H) 1.12-1.18 (m, 1 H) 1.73 (dt, J = 9.15, 6.97 Hz, 1 H)3.99-4.06 (m, 1 H) 5.88 (s, 2 H) 6.20 (t, J = 56.10 Hz, 1 H) 7.24 (dd, J= 11.93, 8.80 Hz, 1 H) 7.88 (ddd, J = 8.80, 4.11, 2.93 Hz, 1 H) 8.06(dd, J = 7.04, 2.74 Hz, 1 H) 8.28 (dd, J = 8.22, 0.78 Hz, 1 H) 8.59 (dd,J = 8.22, 1.96 Hz, 1 H) 9.21 (dd, J = 2.05, 0.88 Hz, 1 H) 10.88 (s, 1 H)66 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-chloro-5-cyanopicolinamide

MS m/z = 436.0 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.90 (dt, J =9.29, 6.50 Hz, 1 H) 1.10-1.15 (m, 1 H) 1.67-1.75 (m, 1 H) 3.95-4.01 (m,1 H) 5.93 (s, 2 H) 6.19 (t, J = 55.90 Hz, 1 H) 7.26 (dd, J = 11.74, 8.80Hz, 1 H) 7.75 (dd, J = 7.04, 2.74 Hz, 1 H) 7.83 (ddd, J = 8.75, 4.06,2.84 Hz, 1 H) 8.81 (d, J = 1.57 Hz, 1 H) 9.11 (d, J = 1.57 Hz, 1 H)10.95 (s, 1 H) 67 B N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-chloro-5-cyanopicolinamide

MS m/z = 436.0[M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.90 (dt, J =9.19, 6.46 Hz, 1 H) 1.09-1.15 (m, 1 H) 1.67-1.75 (m, 1 H) 3.95-4.02 (m,1 H) 5.93 (s, 2 H) 6.19 (t, J = 55.90 Hz, 1 H) 7.26 (dd, J = 11.83, 8.90Hz, 1 H) 7.75 (dd, J = 6.85, 2.74 Hz, 1 H) 7.83 (ddd, J = 8.75, 4.06,2.84 Hz, 1 H) 8.81 (d, J = 1.76 Hz, 1 H) 9.11 (d, J = 1.56 Hz, 1 H)10.95 (s, 1 H) 68 B N-(3-((1R,5S,6R)-3- amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropicolinamide

MS m/z = 375.0 [M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.78 (dd, J = 8.02,4.50 Hz, 2 H) 1.49 (s, 3 H) 1.58 (q, J = 7.82 Hz, 1 H) 3.88-3.97 (m, 1H) 5.44 (br. s., 2 H) 7.14 (dd, J = 11.93, 8.80 Hz, 1 H) 7.75- 7.80 (m,1 H) 7.85 (dd, J = 7.43, 2.74 Hz, 1 H) 8.14 (d, J = 8.41 Hz, 1 H) 8.19(dd, J = 8.41, 2.35 Hz, 1 H) 8.78 (d, J = 1.76 Hz, 1 H) 10.57 (s, 1 H)69 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-6-chloro-3-methylimidazo[1,2- a]pyridine-2- carboxamide

MS m/z = 463.9 [M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (q, J = 6.80Hz, 1 H) 1.10- 1.21 (m, 1 H) 1.74 (q, J = 7.69 Hz, 1 H) 2.81 (s, 3 H)3.99-4.07 (m, 1 H) 5.85 (s, 2 H) 6.19 (t, J = 55.90 Hz, 1 H) 7.18 (dd, J= 11.64, 9.10 Hz, 1 H) 7.42 (dd, J = 9.58, 1.37 Hz, 1 H) 7.69 (d, J =9.59 Hz, 1 H) 7.84-7.92 (m, 1 H) 7.95- 8.03 (m, 1 H) 8.68 (s, 1 H) 10.24(s, 1 H) 70 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-chloro-5-methoxypicolinamide

MS m/z = 440.8 [M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.91 (dt, J = 9.24,6.53 Hz, 1 H) 1.08-1.18 (m, 1 H) 1.67-1.76 (m, 1 H) 3.93 (s, 3 H)3.96-4.03 (m, 1 H) 5.86 (s, 2 H) 6.19 (t, J = 56.10 Hz, 1 H) 7.17-7.24(m, 1 H) 7.72 (d, J = 2.54 Hz, 1 H) 7.78-7.87 (m, 2 H) 8.34 (d, J = 2.54Hz, 1 H) 10.57 (s, 1 H) 71 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3,5- dichloropicolinamide

MS m/z = 444.8 [M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.90 (dt, J = 9.19,6.46 Hz, 1 H) 1.10-1.16 (m, 1 H) 1.67-1.75 (m, 1 H) 3.96-4.01 (m, 1 H)5.89 (s, 2 H) 6.19 (t, J = 56.10 Hz, 1 H) 7.23 (dd, J = 11.93, 8.80 Hz,1 H) 7.77 (dd, J = 6.94, 2.64 Hz, 1 H) 7.79-7.84 (m, 1 H) 8.44 (d, J =1.96 Hz, 1 H) 8.72 (d, J = 1.96 Hz, 1 H) 10.78 (s, 1 H) 72 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 407.9 [M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.91 (dt, J = 9.29,6.50 Hz, 1 H) 1.12-1.18 (m, 1 H) 1.69-1.76 (m, 1 H) 4.02 (s, 3 H)3.99-4.05 (m, 1 H) 5.85 (s, 2 H) 6.19 (t, J = 56.10 Hz, 1 H) 7.21 (dd, J= 11.74, 8.80 Hz, 1 H) 7.85 (ddd, J = 8.80, 4.11, 2.93 Hz, 1 H) 8.03(dd, J = 7.04, 2.74 Hz, 1 H) 8.41 (d, J = 1.37 Hz, 1 H) 8.89 (d, J =1.17 Hz, 1 H) 10.52 (s, 1 H) 73 B N-(5- ([1(R,S),5(S,R),6(R,S)]-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept-3-en-5-yl)-6- fluoropyridin-3-yl)-5- chloropicolinamide

MS m/z = 411.8 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.05 (dt, J =9.44, 6.92 Hz, 1 H) 1.41-1.47 (m, 1 H) 1.92 (dt, J = 9.73, 7.16 Hz, 1 H)4.02 (td, J = 6.75, 2.74 Hz, 1 H) 4.84 (br. s., 2 H) 6.19 (t, J = 55.40Hz, 1 H) 7.90 (dd, J = 8.41, 2.35 Hz, 1 H) 8.24 (d, J = 8.41 Hz, 1 H)8.37 (dd, J = 8.41, 2.60 Hz, 1 H) 8.58 (d, J = 1.96 Hz, 1 H) 8.71 (t, J= 2.15 Hz, 1 H) 9.89 (s, 1 H) 74 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- bromopicolinamide

MS m/z = 454.7 [M]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (dt, J = 9.24,6.53 Hz, 1 H) 1.12-1.18 (m, 1 H) 1.69-1.78 (m, 1 H) 3.99-4.05 (m, 1 H)5.86 (s, 2 H) 6.19 (t, J = 56.10 Hz, 1 H) 7.22 (dd, J = 11.84, 8.90 Hz,1 H) 7.84-7.90 (m, 1 H) 8.03 (dd, J = 7.04, 2.74 Hz, 1 H) 8.08 (d, J =8.22 Hz, 1 H) 8.32 (dd, J = 8.41, 2.35 Hz, 1 H) 8.86 (d, J = 2.15 Hz, 1H) 10.69 (s, 1 H) 75 B N-(5- ([1(R,S),5(S,R),6(R,S)]- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-6-fluoropyridin-3-yl)-5- cyanopicolinamide

MS m/z = 402.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.03 (dt, J =9.54, 6.97 Hz, 1 H) 1.40-1.46 (m, 1 H) 1.89 (dt, J = 9.68, 7.09 Hz, 2 H)3.98 (td, J = 6.80, 2.54 Hz, 1 H) 4.71 (br. s., 2 H) 6.18 (t, J = 55.80Hz, 1 H) 8.22 (dd, J = 8.22, 1.96 Hz, 1 H) 8.34 (dd, J = 8.41, 2.74 Hz,1 H) 8.42 (dd, J = 8.10, 0.60 Hz, 1 H) 8.69-8.72 (m, 1 H) 8.90 (dd, J =1.70, 0.70 Hz, 1 H) 9.87 (s, 1 H) 76 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- chloropicolinamide

MS m/z = 410.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.92-1.00 (m, 1H) 1.39-1.46 (m, 1 H) 1.87 (dt, J = 9.44, 7.12 Hz, 1 H) 3.90-3.95 (m, 1H) 4.82 (br. s., 2 H) 6.24 (t, J = 56.10 Hz, 1 H) 7.04 (dd, J = 11.44,8.90 Hz, 1 H) 7.63 (dd, J = 6.65, 2.74 Hz, 1 H) 7.85 (dd, J = 8.41, 2.35Hz, 1 H) 7.95 (ddd, J = 8.80, 4.11, 2.93 Hz, 1 H) 8.18 (d, J = 8.41 Hz,1 H) 8.46 (d, J = 2.15 Hz, 1 H) 9.72 (s, 1 H) 77 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- cyanopicolinamide

MS m/z = 402.0 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (dt, J =9.19, 6.46 Hz, 1 H) 1.12-1.18 (m, 1 H) 1.73 (dt, J = 9.24, 6.92 Hz, 1 H)3.99-4.06 (m, 1 H) 5.89 (s, 2 H) 6.20 (t, J = 55.90 Hz, 1 H) 7.24 (dd, J= 11.74, 8.80 Hz, 1 H) 7.88 (ddd, J = 8.80, 4.11, 2.74 Hz, 1 H) 8.06(dd, J = 7.04, 2.74 Hz, 1 H) 8.28 (dd, J = 8.30, 0.80 Hz, 1 H) 8.59 (dd,J = 8.12, 2.05 Hz, 1 H) 9.21 (dd, J = 2.00, 0.78 Hz, 1 H) 10.88 (s, 1 H)78 B N-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-2,4- difluorophenyl)-5-methoxypicolinamide

MS m/z = 406..9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.80-0.98 (m, 2 H)1.50-1.61 (m, 1 H) 3.94 (s, 3 H) 4.09-4.15 (m, 1 H) 4.27-4.97 (m, 2 H)5.55 (s, 2 H) 7.04-7.14 (m, 1 H) 7.63 (dd, J = 8.77, 2.92 Hz, 1 H)8.03-8.10 (m, 1 H) 8.13 (d, J = 8.92 Hz, 1 H) 8.44 (d, J = 2.78 Hz, 1 H)10.00-10.30 (m, 1 H) 10.14 (d, J = 2.19 Hz, 1 H). 79 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-2,4- difluorophenyl)-5-methoxypicolinamide

MS m/z = 406.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.81-0.98 (m, 2 H)1.47-1.65 (m, 1 H) 3.94 (s, 3 H) 4.05-4.17 (m, 1 H) 4.28-4.97 (m, 2 H)5.56 (s, 2 H) 7.04-7.14 (m, 1 H) 7.63 (dd, J = 8.77, 2.78 Hz, 1 H)8.00-8.00 (m, 1 H) 8.02-8.11 (m, 1 H) 8.13 (d, J = 8.77 Hz, 1 H) 8.44(d, J = 2.48 Hz, 1 H) 10.14 (s, 1 H). 80 A N-(3-((1R,5S,6R)-3- amino-5-(methoxymethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- methoxypyrazine-2- carboxamide

MS m/z = 401.9 [M]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.78 (dt, J = 9.63,6.33 Hz, 1 H) 0.88-0.96 (m, 1 H) 1.49-1.61 (m, 1 H) 3.23 (s, 3 H)3.48-3.75 (m, 2 H) 3.98-4.04 (m, 4 H) 5.42 (s, 2 H) 7.08 (dd, J = 11.93,8.80 Hz, 1 H) 7.76 (dt, J = 8.66, 3.40 Hz, 1 H) 7.95 (dd, J = 7.34, 2.64Hz, 1 H) 8.41 (d, J = 1.37 Hz, 1 H) 8.89 (d, J = 1.17 Hz, 1 H) 10.43 (s,1 H). 81 A N-(3-((1S,5R,6S)-3- amino-5- (methoxymethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 401.9 [M]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.80-0.89 (m, 1 H)0.95-1.03 (m, 1 H) 1.56-1.69 (m, 1 H) 3.29 (s, 3 H) 3.54-3.82 (m, 2 H)4.02-4.13 (m, 4 H) 5.48 (s, 2 H) 7.15 (dd, J = 11.93, 8.80 Hz, 1 H)7.76-7.87 (m, 1 H) 8.01 (dd, J = 7.34, 2.64 Hz, 1 H) 8.47 (d, J = 1.37Hz, 1 H) 8.95 (d, J = 1.17 Hz, 1 H) 10.49 (s, 1 H). 82 AN-(3-((1R,5S,6R)-3- amino-5- (methoxymethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropicolinamide

MS m/z = 404.9 [M]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.71-0.86 (m, 1 H)0.88-0.98 (m, 1 H) 1.51-1.65 (m, 1 H) 3.24 (s, 3 H) 3.53 (d, J = 9.78Hz, 1 H) 3.72 (d, J = 9.19 Hz, 1 H) 4.02 (br. s., 1 H) 5.43 (br. s., 2H) 7.10 (t, J = 10.37 Hz, 1 H) 7.79 (br. s., 1 H) 7.96 (d, J = 6.85 Hz,1 H) 8.10-8.27 (m, 2 H) 8.79 (s, 1 H) 10.61 (s, 1 H). 83 AN-(3-((1S,5R,6S)-3- amino-5- (methoxymethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropicolinamide

MS m/z = 404.9 [M]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.73-0.98 (m, 2 H)1.51-1.64 (m, 1 H) 3.24 (s, 3 H) 3.48-3.60 (m, 1 H) 3.72 (d, J = 8.80Hz, 1 H) 4.02 (br. s., 1 H) 5.43 (br. s., 2 H) 7.10 (t, J = 9.78 Hz, 1H) 7.78 (br. s., 1 H) 7.96 (d, J = 7.24 Hz, 1 H) 8.18 (q, J = 8.15 Hz, 2H) 8.79 (s, 1 H) 10.61 (s, 1 H). 84 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3,5- dimethoxypyrazine-2- carboxamide

MS m/z = 437.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.90-1.03 (m, 1 H)1.20 (br. s., 1 H) 1.72-1.84 (m, 1 H) 4.07 (d, J = 3.80 Hz, 7 H) 5.82(s, 2 H) 6.25 (dt, J = 56.42, 1.00 Hz, 1 H) 7.25 (dd, J = 11.91, 8.70Hz, 1 H) 7.82-7.94 (m, 1 H) 8.00 (s, 1 H) 10.36 (s, 1 H). 85 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-5-chloro-4- fluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 423.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.77-0.93 (m, 1 H)0.93-1.06 (m, 1 H) 1.47-1.66 (m, 1 H) 3.95- 4.14 (m, 4 H) 4.31-4.79 (m,2 H) 5.67 (s, 2 H) 8.02 (d, J = 4.24 Hz, 1 H) 8.11 (d, J = 6.10 Hz, 1 H)8.42 (s, 1 H) 8.90 (s, 1 H) 10.71 (s, 1 H). 86 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-5-chloro-4- fluorophenyl)-5-cyano- 3-methoxypicolinamide

MS m/z = 447.8 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.78-0.90 (m, 1 H)0.93-1.03 (m, 1 H) 1.46-1.60 (m, 1 H) 3.93 (s, 3 H) 4.02 (br. s., 1 H)4.38-4.71 (m, 2 H) 5.70 (s, 2 H) 7.67 (d, J = 5.99 Hz, 1 H) 8.07 (d, J =4.82 Hz, 1 H) 8.23 (s, 1 H) 8.68 (s, 1 H) 10.86 (s, 1 H). 87 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-5-chloro-4- fluorophenyl)-5-(difluoromethoxy)-3- methylpicolinamide

MS m/z = 472.8 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.85-0.98 (m, 1 H)0.99-1.11 (m, 1 H) 1.61 (q, J = 8.04 Hz, 1 H) 2.66 (s, 3 H) 4.11 (br.s., 1 H) 4.42-4.83 (m, 2 H) 5.74 (s, 2 H) 7.45 (t, J = 71.90 Hz, 1 H)7.79 (s, 1 H) 7.90 (d, J = 3.80 Hz, 1 H) 8.19 (d, J = 6.14 Hz, 1 H) 8.50(s, 1 H) 10.78 (s, 1 H). 88 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-5-chloro-4- fluorophenyl)-5- cyanopicolinamide

MS m/z = 417.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.78-0.93 (m, 1 H)0.93-1.05 (m, 1 H) 1.48-1.64 (m, 1 H) 4.00- 4.13 (m, 1 H) 4.35-4.78 (m,2 H) 5.68 (s, 2 H) 8.05 (d, J = 7.45 Hz, 1 H) 8.14 (d, J = 5.70 Hz, 1 H)8.29 (d, J = 8.04 Hz, 1 H) 8.59 (d, J = 8.04 Hz, 1 H) 9.21 (s, 1 H)11.03 (s, 1 H). 89 A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-5-chloro-4- fluorophenyl)-5-methoxy-3- methylpyrazine-2- carboxamide

MS m/z = 437.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.79-0.91 (m, 1 H)0.92-1.06 (m, 1 H) 1.46-1.65 (m, 1 H) 4.00 (s, 3 H) 4.02-4.10 (m, 1 H)4.36-4.76 (m, 2 H) 5.67 (s, 2 H) 7.86 (d, J = 5.70 Hz, 1 H) 8.12 (d, J =6.58 Hz, 1 H) 8.25 (s, 1 H) 10.63 (s, 1 H). 90 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-5-chloro-4- fluorophenyl)-5-(2,2,2- trifluoroethoxy)pyrazine-2-carboxamide

MS m/z = 491.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.79-0.92 (m, 1 H)0.93-1.05 (m, 1 H) 1.48-1.63 (m, 1 H) 3.99- 4.13 (m, 1 H) 4.36-4.79 (m,2 H) 5.17 (q, J = 8.82 Hz, 2 H) 5.67 (s, 2 H) 8.04 (d, J = 5.99 Hz, 1 H)8.12 (d, J = 5.70 Hz, 1 H) 8.63 (s, 1 H) 8.93 (s, 1 H) 10.80 (s, 1 H).91 A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-5-chloro-4- fluorophenyl)-5-cyano-3-methylpicolinamide

MS m/z = 431.9 [M]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.79-0.92 (m, 1 H)0.93-1.06 (m, 1 H) 1.46-1.63 (m, 1 H) 2.56 (s, 3 H) 3.98-4.10 (m, 1 H)4.38-4.75 (m, 2 H) 5.69 (s, 2 H) 7.81 (br. s., 1 H) 8.11 (d, J = 4.38Hz, 1 H) 8.41 (s, 1 H) 8.99 (s, 1 H) 10.91 (s, 1 H). 92 BN-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-chloropicolinamide

MS m/z = 427.0 [M + H]+ H NMR (400 MHz, DMSO-d6) d ppm 10.74 (br. s., 1H) 8.78-8.80 (m, 1 H) 8.14-8.26 (m, 3 H) 7.92 (dd, J = 8.71, 2.64 Hz, 1H) 7.44-7.50 (m, 1 H) 6.85-6.88 (m, 1 H) 6.70-6.75 (m, 1 H) 6.57-6.60(m, 1 H) 5.81-5.89 (m, 2 H) 3.98 (t, J = 7.14 Hz, 1 H) 1.85- 1.93 (m, 1H) 1.07-1.15 (m, 1 H) 0.91-1.00 (m, 1 H) 93 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5- cyanopicolinamide

MS m/z = 418.0 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.64-9.71(m, 1 H) 8.94-8.96 (m, 1 H) 8.94 (s, 1 H) 7.94-8.01 (m, 1 H) 7.69-7.74(m, 1 H) 7.06-7.13 (m, 1 H) 6.38 (s, 1 H) 6.24 (s, 1 H) 6.10 (s, 1 H)3.91- 3.96 (m, 1 H) 1.83-1.91 (m, 1 H) 1.40-1.46 (m, 1 H) 0.93-1.01 (m,1 H) 94 B N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-cyanopicolinamide

MS m/z = 418.0 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 9.64-9.71(m, 1 H) 8.94-8.96 (m, 1 H) 8.94 (s, 1 H) 7.94-8.01 (m, 1 H) 7.69-7.74(m, 1 H) 7.06-7.13 (m, 1 H) 6.38 (s, 1 H) 6.24 (s, 1 H) 6.10 (s, 1 H)3.91- 3.96 (m, 1 H) 1.83-1.91 (m, 1 H) 1.40-1.46 (m, 1 H) 0.93-1.01 (m,1 H) 95 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide trifluoroacetate

MS m/z = 431.0 [M]+ 1H NMR (400 MHz, DMSO-d6): δ 10.85 (s, 1 H), 10.70(br s, 1 H), 9.47 (br s, 1 H), 8.93 (d, J = 1.4 Hz, 1 H), 8.52 (d, J =1.4 Hz, 1 H), 8.24 (br s, 1 H), 8.18 (dd, J = 7.2, 2.5 Hz, 1 H),7.96-8.07 (m, 1 H), 7.44 (dd, J = 11.9, 9.0 Hz, 1 H), 6.58-6.93 (m, 1H), 5.12- 5.22 (m, 2 H), 4.69 (br s, 1 H), 3.62- 3.71 (m, 1 H),2.04-2.19 (m, 1 H), 1.63 (br s, 1 H), 1.30 (q, J = 7.9 Hz, 1 H); 19F NMR(377 MHz, DMSO-d6): δ −73.76 (s, 3 F), −117.16 (s, 1 F), −126.50 (d, J =279 Hz, 1 F), −128.54 (d, J = 279 Hz, 1 F). 96 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(but-2- yn-1-yloxy)pyrazine-2- carboxamidetrifluoroacetate

MS m/z = 446.0 [M + H]+ 1H NMR (400 MHz, DMSO-d6): d 10.83 (s, 1 H),10.77 (br s, 1 H), 9.45 (br s, 1 H), 8.92 (d, J = 1.2 Hz, 1 H), 8.49 (d,J = 1.2 Hz, 1 H), 8.37 (br s, 1 H), 8.18 (dd, J = 7.1, 2.4 Hz, 1 H),8.02 (m, 1 H), 7.44 (dd, J = 11.9, 9.0 Hz, 1 H), 6.74 (t, J = 51 Hz, 1H), 5.12 (q, J = 2.2 Hz, 2 H), 4.68 (br s, 1 H), 2.12 (q, J = 8.1 Hz, 1H), 1.87 (t, J = 2.3 Hz, 3 H), 1.63 (t, J = 6.3 Hz, 1 H), 1.30 (q, J =8.1 Hz, 1 H); 19F NMR (377 MHz, DMSO-d6): d −73.82 (s, 3 F), −117.20 (brs, 1 F), −126.48 (d, J = 287 Hz, 1 F), −128.55 (d, J = 287 Hz, 1 F). 97B N-(3-(((1R,S), (5S,R), (6R,S))-3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-chloropicolinamide trifluoroacetate

MS m/z = 427.0 [M + H]+ 1H NMR (400 MHz, CD3OD): d 8.75 (d, J = 2.2 Hz,1 H), 8.43 (d, J = 2.3 Hz, 1 H), 8.24 (d, J = 8.4 Hz, 1 H), 8.12 (dd, J= 8.4, 2.3 Hz, 1 H), 7.87 (dd, J = 8.7, 2.4 Hz, 1 H), 7.64 (d, J = 8.8Hz, 1 H), 7.11 (t, J = 54.8 Hz, 1 H), 4.61 (td, J = 6.7, 2.5 Hz, 1 H),2.45 (dt, J = 9.8, 7.2 Hz, 1 H), 1.66 (t, J = 7.7 Hz, 1 H), 1.42 (ddd, J= 9.9, 8.3, 6.5 Hz, 1 H); 19F NMR (377 MHz, CD3OD): d −76.95 (br s, 3F), −127.45 (d, J = 280.1 Hz, 1 F), −129.82 (d, J = 281.9 Hz, 1 F). 98 BN-(3-(((1R,S), (5S,R), (6R,S))-3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-cyanopicolinamide trifluoroacetate

MS m/z = 418.0 [M + H]+ 1H NMR (400 MHz, CD3OD): d 9.09 (dd, J = 2.0,0.8 Hz, 1 H), 8.43-8.50 (m, 2 H), 8.37-8.42 (m, 1 H), 7.90 (dd, J = 8.6,2.5 Hz, 1 H), 7.66 (d, J = 8.6 Hz, 1 H), 7.11 (t, J = 54.8 Hz, 1 H),4.62 (td, J = 6.7, 2.7 Hz, 1 H), 2.45 (dt, J = 9.9, 7.2 Hz, 1 H), 1.66(t, J = 7.7 Hz, 1 H), 1.43 (ddd, J = 9.9, 8.3, 6.3 Hz, 1 H); 19F NMR(377 MHz, CD3OD): d −76.97 (br s, 3 F), −127.42 (d, J = 283.1 Hz, 1 F),−129.82 (d, J = 284.3 Hz, 1 F). 99 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5- chloropicolinamide

MS m/z = 426.8 [M]+ 1H NMR (400 MHz, DMSO-d6) d ppm 10.75 (s, 1 H)8.78-8.80 (m, 1 H) 8.14-8.25 (m, 3 H) 7.91 (br. s., 1 H) 7.44-7.50 (m, 1H) 6.87 (s, 1 H) 6.73 (s, 1 H) 6.57-6.60 (m, 1 H) 5.82- 5.87 (m, 2 H)3.95-4.02 (m, 1 H) 1.85-1.93 (m, 1 H) 1.07-1.14 (m, 1 H) 0.91-0.99 (m, 1H) 100 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-methoxypicolinamide

MS m/z = 422.9 [M]+ 1H NMR (400 MHz, CDCl3): δ 9.82 (s, 1H), 8.20 (s,1H), 8.17-8.19 (m, 1H), 8.01 (dd, J = 2.74, 8.61 Hz, 1H), 7.78 (d, J =2.74 Hz, 1H), 7.28-7.39 (m, 2H), 6.83 (t, J = 55.95 Hz, 1H), 4.70 (br.s., 2H), 3.94 (s, 3H), 3.82-3.90 (m, 1H), 2.08 (td, J = 7.14, 9.78 Hz,1H), 1.38 (t, J = 7.04 Hz, 1H), 0.91- 1.03 (m, 1H); 19F NMR (377 MHz,CDCl3): δ −126.39 (d, J = 278.35 Hz, 1F), −129.09 (d, J = 278.40 Hz,1F). 101 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5- methoxy-3-methylpicolinamide

MS m/z = 437.0 [M + H]+ 1H NMR (400 MHz, CDCl3): δ 10.04 (s, 1H), 8.04(d, J = 8.79 Hz, 1H), 8.00 (s, 1H), 7.64 (d, J = 2.54 Hz, 1H), 7.30 (d,J = 8.80 Hz, 1H), 7.05 (d, J = 2.35 Hz, 1H), 6.82 (t, J = 55.95 Hz, 1H),4.79 (br. s., 2H), 3.92 (s, 3H), 3.82- 3.89 (m, 1H), 2.77 (s, 3H), 2.09(td, J = 7.19, 9.68 Hz, 1H), 1.38 (t, J = 7.04 Hz, 1H), 0.97 (td, J =6.82, 9.63 Hz, 1H); 19F NMR (377 MHz, CDCl3): δ −126.34 (d, J = 278.40Hz, 1F), −129.10 (d, J = 278.30 Hz, 1F) 102 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5-(oxazol- 4-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 490.9 [M + H]+ 1H NMR (400 MHz, CDCl3): δ 9.42 (s, 1H), 8.98(s, 1H), 8.13 (s, 1H), 7.99 (dd, J = 2.54, 8.61 Hz, 1H), 7.93 (s, 1H),7.82 (s, 1H), 7.74 (d, J = 2.35 Hz, 1H), 7.31 (d, J = 8.61 Hz, 1H), 6.82(t, J = 55.20 Hz, 1H), 5.46 (s, 2H), 4.88 (br s, 2H), 3.87 (t, J = 5.58Hz, 1H), 2.05-2.14 (m, 1H), 1.39 (br s, 1H), 0.92-1.04 (m, 1H); 19F NMR(377 MHz, CDCl3): δ −126.1 (d, J = 278.40 Hz, 1F), −129.2 (d, J = 278.30Hz, 1F). 103 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-methoxypyrimidine-2- carboxamide

MS m/z = 407.9 [M]+ 1H NMR (400 MHz, CDCl3): δ 9.56- 9.89 (m, 1H), 8.51(s, 2H), 7.90-8.08 (m, 1H), 7.67-7.83 (m, 1H), 7.05-7.17 (m, 1H), 6.24(t, J = 54.80 Hz, 1H), 4.49 (br s, 2H), 4.02 (s, 3H), 3.93-3.99 (m, 1H),1.85-1.91 (m, 1H), 1.39-1.48 (m, 1H), 0.92-1.05 (m, 1H); 19F NMR (377MHz, CDCl3): δ −115.77 (dd, J = 8.35, 10.73 Hz, 1F), −127.43 (d, J =287.29 Hz, 1F), −129.55 (d, J = 275.96 Hz, 1F). 104 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-methoxypyrimidine-2- carboxamide

MS m/z = 424.0 [M + H]+ 1H NMR (400 MHz, CDCl3): δ 9.81 (s, 1H), 8.51(s, 2H), 8.02 (dd, J = 2.54, 8.61 Hz, 1H), 7.91 (d, J = 2.54 Hz, 1H),7.41 (d, J = 8.61 Hz, 1H), 6.84 (t, J = 55.40 Hz, 1H), 4.73 (br s, 2H),4.03 (s, 3H), 3.89-3.93 (m, 1H), 2.11 (td, J = 7.24, 9.78 Hz, 1H), 1.40(t, J = 7.24 Hz, 1H), 1.01 (td, J = 6.75, 9.78 Hz, 1H); 19F NMR (377MHz, CDCl3): δ −126.31 (d, J = 278.95 Hz, 1F), −128.99 (d, J = 278.95Hz, 1F). 105 C N-(6-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-5-fluoropyridin- 2-yl)-5-chloropicolinamide

MS m/z = 394 [M + H]+ 1H NMR (CHLOROFORM-d) Shift: 8.63 (d, J = 2.3 Hz,1H), 8.34 (dd, J = 8.9, 3.0 Hz, 1H), 8.24 (d, J = 8.4 Hz, 1H), 7.91 (dd,J = 8.4, 2.3 Hz, 1H), 7.50 (dd, J = 10.5, 8.9 Hz, 1H), 5.11 (ddt, J =46.6, 8.6, 1.0 Hz, 1H), 4.60 (dd, J = 46.9, 8.6 Hz, 1H), 4.12- 4.21 (m,1H), 2.1-2.25(br s, 3 H) 1.72-1.83 (m, 1H), 1.18 (td, J = 6.9, 2.3 Hz,1H), 1.02 (dt, J = 9.8, 6.7 Hz, 1H) 106 C N-(6-((1S,5R,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin- 2-yl)-5- chloropicolinamide

MS m/z = 394 [M + H]+ 1H NMR (CHLOROFORM-d) Shift: 8.63 (t, J = 2.2 Hz,1H), 8.33 (dt, J = 8.8, 2.8 Hz, 1H), 8.25 (dd, J = 8.3, 2.2 Hz, 1H),7.92 (dt, J = 8.3, 2.6 Hz, 1H), 7.46-7.55 (m, 1H), 5.10 (ddd, J = 46.8,8.6, 2.0 Hz, 1H), 4.60 (ddd, J = 46.9, 8.6, 2.2 Hz, 1H), 4.10-4.22 (m,1H), 1.57-1.83 (m, 3H), 1.10- 1.22 (m, 1H), 0.96-1.06 (m, 1H) 107 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5- difluorophenyl)-5-chloropicolinamide

MS m/z = 428.9 [M]+ 1H NMR (CHLOROFORM-d) Shift: 9.70 (br. s, 1H), 8.48(dd, J = 1.8, 0.4 Hz, 1H), 8.19 (dd, J = 8.3, 0.4 Hz, 1H), 8.03 (ddd, J= 11.7, 6.9, 2.7 Hz, 1H), 7.87 (dd, J = 8.3, 2.3 Hz, 1H), 7.24- 7.30 (m,1H), 6.18 (td, J = 55.7, 1.0 Hz, 1H), 4.76 (br. s, 2H), 3.94 (td, J =6.8, 2.8 Hz, 1H), 1.80-1.92 (m, 1H), 1.38- 1.47 (m, 1H), 0.93-1.03 (m,1H) 108 B N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5- difluorophenyl)-5-chloropicolinamide

MS m/z = 428.9 [M]+ 1H NMR (CHLOROFORM-d) Shift: 9.69 (br. s, 1H), 8.48(d, J = 2.0 Hz, 1H), 8.18 (d, J = 8.3 Hz, 1H), 8.03 (ddd, J = 11.7, 7.0,2.8 Hz, 1H), 7.87 (dd, J = 8.3, 2.3 Hz, 1H), 6.18 (td, J = 55.8, 1.2 Hz,1H), 4.82 (br. s., 2H), 3.93 (td, J = 6.8, 2.6 Hz, 1H), 3.49 (s, 1H),1.79-1.93 (m, 1H), 1.38-1.47 (m, 1H), 0.92-1.03 (m, 1H) 109 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5- difluorophenyl)-5-cyanopicolinamide

MS m/z = 419.9 [M]+ 1H NMR (CHLOROFORM-d) Shift: 9.62 (br. s., 1H), 8.80(dd, J = 2.0, 0.8 Hz, 1H), 8.37 (dd, J = 8.2, 0.7 Hz, 1H), 8.20 (dd, J =8.1, 2.0 Hz, 1H), 8.02 (ddd, J = 11.5, 6.9, 2.8 Hz, 1H), 7.21- 7.28 (m,1H), 6.20 (td, J = 55.8, 1.3 Hz, 1H), 4.94 (br. s., 2H), 3.86-3.98 (m,1H), 1.77-1.92 (m, 1H), 1.38-1.49 (m, 1H), 0.91-1.08 (m, 1H) 110 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5- difluorophenyl)-4- chloro-1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 467.9 [M]+ 1H NMR (MeOH) Shift: 8.40 (s, 1H), 7.93 (ddd, J =11.8, 6.9, 2.7 Hz, 1H), 7.37-7.80 (m, 2H), 6.22 (t, J = 55.8 Hz, 1H),4.04-4.14 (m, 1H), 1.84-1.95 (m, 1H), 1.28-1.41 (m, 1H), 0.95-1.06 (m,1H) 111 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5- difluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine- 2-carboxamide

MS m/z = 449.9 [M + H]+ 1H NMR (CHLOROFORM-d) Shift: 9.00 (d, J = 1.3Hz, 1H), 8.22 (d, J = 1.3 Hz, 1H), 8.09 (ddd, J = 11.7, 6.9, 2.7 Hz,1H), 7.23 (dt, J = 5.3, 2.4 Hz, 1H), 6.18 (td, J = 55.7, 0.9 Hz, 1H),5.09 (d, J = 2.5 Hz, 2H), 3.91-4.00 (m, 1H), 2.58 (t, J = 2.4 Hz, 1H),2.45 (br. s., 3H), 1.78-1.91 (m, 1H), 1.40 (t, J = 5.8 Hz, 1H),0.93-1.04 (m, 1H) 112 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5-difluorophenyl)-5- methoxypyrazine-2- carboxamide

MS m/z = 425.9 [M + H]+ 1H NMR (CHLOROFORM-d) Shift: 9.32 (br. s, 1H),8.95 (d, J = 1.3 Hz, 1H), 7.92-8.10 (m, 2H), 7.22 (dt, J = 5.2, 2.5 Hz,1H), 6.18 (td, J = 55.7, 1.0 Hz, 1H), 4.88 (br. s., 2H), 4.07 (s, 3H),3.86-3.98 (m, 1H), 1.79-1.91 (m, 1H), 1.42 (t, J = 6.4 Hz, 1H),0.91-1.02 (m, 1H) 113 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5-difluorophenyl)-5- cyanopicolinamide

MS m/z = 419.9 [M]+ 1H NMR (CHLOROFORM-d) Shift: 9.51 (br. s, 1H), 8.76(d, J = 0.8 Hz, 1H), 8.35 (d, J = 8.2 Hz, 1H), 8.19 (dd, J = 8.2, 1.8Hz, 1H), 7.98 (ddd, J = 11.4, 7.0, 2.5 Hz, 1H), 7.16-7.21 (m, 1H), 6.22(t, J = 55.8 Hz, 1H), 5.20 (br. s., 2H), 3.88-3.95 (m, 1H), 1.80-1.89(m, 1H), 1.42-1.49 (m, 1H), 0.81-1.08 (m, 1H) 114 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5- difluorophenyl)-4- chloro-1- (difluoromethyl)-1H-pyrazole-3-carboxamide

MS m/z = 467.8 [M]+ 1H NMR (CHLOROFORM-d) Shift: 8.46 (s, 1H), 8.00-8.11(m, 1H), 7.90 (s, 1H), 6.87-7.31 (m, 2H), 6.16 (td, J = 55.7, 1.3 Hz,1H), 4.96 (br. s., 1H), 3.88-3.97 (m, 1H), 1.79-1.90 (m, 1H), 1.37-1.45(m, 1H), 0.91-1.03 (m, 1H) 115 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5-difluorophenyl)-5-(prop- 2-yn-1-yloxy)pyrazine- 2-carboxamide

MS m/z = 449.9 [M]+ 1H NMR (CHLOROFORM-d) Shift: 9.00 (d, J = 1.3 Hz,1H), 8.20 (d, J = 1.2 Hz, 1H), 8.07 (ddd, J = 11.7, 6.9, 2.6 Hz, 1H),7.24 (dt, J = 5.3, 2.4 Hz, 1H), 6.17 (td, J = 55.5, 1.3 Hz, 1H), 5.09(d, J = 2.3 Hz, 2H), 3.91-3.99 (m, 1H), 2.56 (t, J = 2.4 Hz, 1H),1.80-1.90 (m, 2H), 1.61 (br. s., 2H), 1.40 (t, J = 6.3 Hz, 1H),0.93-1.04 (m, 1H) 116 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4,5-difluorophenyl)-5- bromopicolinamide

MS m/z = 472.8 [M]+ 1H NMR (CHLOROFORM-d) Shift: 9.55 (br. s, 1H), 8.51(d, J = 1.8 Hz, 1H), 7.91-8.12 (m, 3H), 7.15-7.24 (m, 1H), 6.22 (td, J =56.0, 0.7 Hz, 1H), 5.23 (br. s., 2H), 3.86-3.95 (m, 1H), 1.80-1.90 (m,1H), 1.40-1.49 (m, 1H), 0.91-1.02 (m, 1H) 117 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-fluorophenyl)-5- chloropicolinamide

MS m/z = 393 [M + H]+ 1H NMR (400 MHz, CDCl3) δ 0.87- 0.95 (m, 1H),1.19-1.27 (m, 1 H), 1.72-1.80 (m, 1 H), 3.95 (ddd, J = 6.11, 4.84, 1.37Hz, 1 H), 4.35 (b br, 2H), 4.58-4.69 (m, 1H), 4.70-4.82 (m, 1H), 7.07(dd, J = 11.54, 8.80 Hz, 1H), 7.63 (dd, J = 6.85, 2.74 Hz, 1H), 7.84-7.92 (m, 1H), 7.92-7.96 (m, 1H), 8.20 (d, J = 8.41 Hz, 1H), 8.51 (d, J =1.76 Hz, 1H), 9.77 (s, 1H) 118 B N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-fluorophenyl)-5- chloropicolinamide

MS m/z = 393 [M + H]+ 1H NMR (400 MHz, CDCl3) δ 0.91 (d, J = 9.59 Hz,1H), 1.21 (d, J = 2.54 Hz, 1H), 1.75 (d, J = 9.78 Hz, 1H), 3.90-4.00 (m,1H), 4.36 (s br, 2H), 4.58-4.69 (m, 1H), 4.70-4.81 (m, 1H), 7.08 (dd, J= 11.54, 8.80 Hz, 1H), 7.63 (dd, J = 6.85, 2.74 Hz, 1H), 7.86 (dd, J =8.41, 2.35 Hz, 1H), 7.95 (td, J = 4.40, 1.17 Hz, 1H), 8.22 (d, J = 8.41Hz, 1H), 8.53 (d, J = 2.35 Hz, 1H), 9.79 (br s, 1H) 119 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropyrimidine-2- carboxamide

MS m/z = 412.0 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) δ = 9.63 (s, 1H), 8.82 (s, 2 H), 7.98 (ddd, J = 2.9, 4.1, 8.8 Hz, 1 H), 7.68 (dd, J =2.7, 6.7 Hz, 1 H), 7.07 (dd, J = 8.8, 11.5 Hz, 1 H), 6.43-6.04 (m, 1 H),4.76 (br. s., 2 H), 3.92 (br. s., 1 H), 1.86 (td, J = 7.1, 9.3 Hz, 1 H),1.48-1.38 (m, 1 H), 1.01- 0.90 (m, 1 H). 120 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3-methyl- 5-(2,2,2- trifluoroethoxy)pyrazine-2-carboxamide

MS m/z = 490.1 [M + H]+ ¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.78-1.03(m, 1 H) 1.39-1.54 (m, 1 H) 1.76- 2.01 (m, 1 H) 2.89 (s, 3 H) 3.79-4.02(m, 1 H) 4.67-5.08 (m, 2 H) 5.32 (br. s., 2 H) 6.25 (t, J = 57.51 Hz, 1H) 6.93 (t, J = 10.07 Hz, 1 H) 7.42 (d, J = 6.26 Hz, 1 H) 7.90 (s, 2 H)9.51 (s, 1 H) 121 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-chloropicolinamide

MS m/z = 424.9 [M + H]+ 1H NMR (300 MHz, CHLOROFORM-d) δ 0.92- 1.05 (m,1 H) 1.39-1.47 (m, 1 H) 1.84-1.94 (m, 1 H) 2.31 (d, J = 2.48 Hz, 3 H)3.94-4.02 (m, 1 H) 6.06- 6.48 (m, 2 H) 7.45 (dd, J = 6.14, 2.92 Hz, 1 H)7.84-7.93 (m, 2 H) 8.19- 8.24 (m, 1 H) 8.53 (d, J = 1.75 Hz, 1 H) 9.74(s, 1 H) 122 C N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-(difluoromethyl)-3- methylpicolinamide

MS m/z = 439 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.80-0.92 (m,1 H) 0.95-1.05 (m, 1 H) 1.97- 2.07 (m, 1 H) 2.86 (s, 3 H) 3.96 (d, J =4.70 Hz, 1 H) 4.78-4.89 (m, 1 H) 4.90-5.00 (m, 1 H) 6.52-7.02 (m, 2 H)7.40 (d, J = 8.80 Hz, 1 H) 7.76 (d, J = 14.08 Hz, 2 H) 8.04 (d, J = 9.00Hz, 1 H) 8.58 (br. s., 1 H) 10.20 (br. s., 1 H) 123 CN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-chloropicolinamide

MS m/z = 424.9 [M]+ 1H NMR (300 MHz, CHLOROFORM-d) δ 0.92-1.05 (m, 1 H)1.39-1.47 (m, 1 H) 1.84-1.94 (m, 1 H) 2.31 (d, J = 2.48 Hz, 3 H)3.94-4.02 (m, 1 H) 6.06-6.48 (m, 2 H) 7.45 (dd, J = 6.14, 2.92 Hz, 1 H)7.84- 7.93 (m, 2 H) 8.19-8.24 (m, 1 H) 8.53 (d, J = 1.75 Hz, 1 H) 9.74(s, 1 H) 124 C N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-chloropicolinamide

MS m/z = 424.9 [M]+ 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.92-1.05 (m, 1H) 1.39-1.48 (m, 1 H) 1.87- 1.94 (m, 1 H) 2.30 (d, J = 2.63 Hz, 3 H)3.96 (t, J = 5.55 Hz, 1 H) 6.07-6.49 (m, 1 H) 7.44 (dd, J = 6.36, 2.70Hz, 1 H) 7.83-7.94 (m, 2 H) 8.21 (d, J = 8.33 Hz, 1 H) 8.52 (d, J = 2.34Hz, 1 H) 9.73 (s, 1 H) 125 C N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-3-methyl- 5-(trifluoromethyl)picolin- amide

MS m/z = 457 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.80-0.90 (m, 1 H)0.93 (d, J = 3.80 Hz, 1 H) 1.60-1.74 (m, 1 H) 2.59 (s, 3 H) 3.90-4.00(m, 1 H) 4.65 (s, 1 H) 4.80 (s, 1 H) 5.60 (s, 2 H) 7.43 (d, J = 8.48 Hz,1 H) 7.86 (dd, J = 8.62, 2.48 Hz, 1 H) 8.01 (d, J = 2.34 Hz, 1 H) 8.29(s, 1 H) 8.90 (s, 1 H) 10.75 (s, 1 H) 126 C N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- (difluoromethoxy)-3- methylpicolinamide

MS m/z = 454.9 [M]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.68-1.09 (m, 2 H)1.67 (br. s., 1 H) 2.59 (br. s., 3 H) 3.97-4.16 (m, 1 H) 4.54-4.71 (m, 1H) 4.72-4.90 (m, 1 H) 5.59 (br. s., 2 H) 7.00-7.53 (m, 2 H) 7.61-7.91(m, 2 H) 7.92- 8.17 (m, 1 H) 8.25-8.56 (m, 1 H) 10.58 (br. s., 1 H) 127B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-3-chloro-5-cyanopicolinamide

MS m/z = 433.8 [M]+ 1H NMR (300 MHz, CHLOROFORM-d) δ 0.94-1.06 (m, 1 H)1.12-1.22 (m, 1 H) 1.96-2.10 (m, 1 H) 3.89-4.04 (m, 1 H) 4.71- 4.89 (m,1 H) 4.90-5.08 (m, 1 H) 7.40 (d, J = 7.89 Hz, 1 H) 7.69 (br. s., 1 H)8.07 (d, J = 9.50 Hz, 1 H) 8.16 (br. s., 1 H) 8.74 (br. s., 1 H) 9.73(br. s., 1 H) 128 C N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-chloro- 3-(methoxymethyl)picolin- amide

MS m/z = 452.9 [M]+ 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.92- 1.04 (m,1 H) 1.17 (s, 1 H) 1.94-2.05 (m, 1 H) 3.56 (s, 3 H) 3.89-4.00 (m, 1 H)4.73-4.86 (m, 1 H) 4.90-5.01 (m, 1 H) 5.10 (s, 1 H) 7.41 (d, J = 8.77Hz, 1 H) 7.72 (s, 1 H) 8.01 (d, J = 7.45 Hz, 1 H) 8.22 (s, 1 H) 8.44 (s,1 H) 10.06 (s, 1 H) 129 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-chloro- 3-fluoropicolinamide

MS m/z = 428. [M]+ 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.94- 1.07 (m, 1H) 1.44 (br. s., 1 H) 1.86- 1.97 (m, 1 H) 4.00 (br. s., 1 H) 6.02- 6.44(m, 1 H) 7.03-7.18 (m, 1 H) 7.50-7.71 (m, 2 H) 7.97-8.06 (m, 1 H) 8.38(s, 1 H) 9.64 (br. s., 1 H) 130 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- methoxypicolinamide

MS m/z = 407 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.91-1.04 (m, 1 H)1.22 (d, J = 6.28 Hz, 1 H) 1.74-1.86 (m, 1 H) 4.00 (s, 3 H) 4.08 (br.s., 1 H) 5.92 (s, 2 H) 6.03-6.51 (m, 1 H) 7.18-7.34 (m, 1 H) 7.68 (d, J= 8.92 Hz, 1 H) 7.94 (d, J = 8.62 Hz, 1 H) 8.07 (d, J = 6.58 Hz, 1 H)8.19 (d, J = 8.77 Hz, 1 H) 8.45 (s, 1 H) 10.52 (s, 1 H) 131 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- methoxy-3-methylpicolinamide

MS m/z = 421 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.84-0.98 (m, 1 H)1.11-1.22 (m, 1 H) 1.67-1.81 (m, 1 H) 2.62 (s, 3 H) 3.91 (s, 3 H)3.97-4.07 (m, 1 H) 5.86 (s, 2 H) 5.96-6.42 (m, 1 H) 7.13- 7.25 (m, 1 H)7.41 (s, 1 H) 7.87 (d, J = 6.14 Hz, 2 H) 8.22 (s, 1 H) 10.35- 10.47 (m,1 H) 132 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-cyano-3-methylpicolinamide

MS m/z = 430 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.86-1.07 (m, 1 H)1.08-1.26 (m, 1 H) 1.63-1.87 (m, 1 H) 2.32 (s, 3 H) 2.60 (s, 3 H) 4.04(br. s., 1 H) 5.90 (s, 2 H) 6.05-6.55 (m, 1 H) 7.69 (d, J = 3.95 Hz, 1H) 7.84 (d, J = 6.14 Hz, 1 H) 8.44 (s, 1 H) 9.03 (s, 1 H) 10.70 (s, 1 H)133 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-3-chloro-5-cyanopicolinamide

MS m/z = 449.9 [M]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.80-1.02 (m, 1 H)1.11 (br. s., 1 H) 1.69 (q, J = 7.70 Hz, 1 H) 2.27 (s, 3 H) 3.83-4.05(m, 1 H) 5.87 (s, 2 H) 5.99-6.44 (m, 1 H) 7.52 (d, J = 5.12 Hz, 1 H)7.75 (d, J = 6.14 Hz, 1 H) 8.79 (s, 1 H) 9.09 (s, 1 H) 10.83 (s, 1 H)134 C N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-chloro-3-methoxypicolinamide

MS m/z = 454.9 [M]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.83-0.95 (m, 1 H)1.06-1.15 (m, 1 H) 1.62-1.75 (m, 1 H) 2.25 (s, 3 H) 3.89 (s, 3 H)3.93-4.01 (m, 1 H) 5.83 (s, 2 H) 6.01-6.41 (m, 1 H) 7.56 (d, J = 5.55Hz, 1 H) 7.73 (d, J = 4.97 Hz, 1 H) 7.83 (s, 1 H) 8.25 (s, 1 H) 10.41(s, 1 H) 135 C N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-3,5-dichloropicolinamide

MS m/z = 458.9 [M]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.77-0.99 (m, 1H)1.03-1.21 (m, 1 H) 1.58-1.81 (m, 1 H) 2.26 (s, 3 H) 3.83-4.05 (m, 1 H)5.86 (s, 2 H) 5.97-6.49 (m, 1 H) 7.54 (d, J = 4.97 Hz, 1 H) 7.75 (d, J =5.99 Hz, 1 H) 8.43 (s, 1 H) 8.71 (s, 1 H) 10.69 (s, 1 H) 136 AN-(3-((1R/S,5S/R,6R/S)- 3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-cyanopicolinamide

MS m/z = 418 [M + H]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.81-1.03 (m, 2H), 1.62 (dt, J = 9.73, 6.97 Hz, 1 H), 3.94-4.06 (m, 1 H), 4.71 (dt, J =47.8, 9.0 Hz, 2 H), 5.62 (s, 2 H), 8.03 (dd, J = 11.25, 2.45 Hz, 1 H),8.09 (br. s., 1 H), 8.29 (dd, J = 8.22, 0.78 Hz, 1 H), 8.58 (dd, J =8.2, 1.7 Hz, 1 H), 9.21 (d, J = 1.17 Hz, 1 H), 11.09 (s, 1 H). 137 BN-(3-((1R/S,5S/R,6R/S)- 3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-cyano-3-methylpicolinamide

MS m/z = 431.9 [M]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.83-0.98 (m, 2 H),1.62 (q, J = 7.69 Hz, 1 H), 2.56 (s, 3 H), 3.98 (br. s., 1 H), 4.60-4.81(m, 2 H), 5.63 (br. s., 2 H), 7.87 (s, 1 H), 7.99 (d, J = 11.15 Hz, 1H), 8.41 (s, 1 H), 8.99 (s, 1 H), 11.00 (br. s., 1 H) 138 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-cyano-3-methylpicolinamide

MS m/z = 432 [M + H]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.81-0.99 (m, 2H), 1.62 (q, J = 7.70 Hz, 1 H), 2.56 (s, 3 H), 3.96 (br. s., 1 H), 4.71(dq, J = 47.9, 9.0 Hz, 2 H), 5.63 (br. s., 2 H), 7.87 (s, 1 H), 7.99 (d,J = 11.15 Hz, 1 H), 8.41 (s, 1 H), 8.99 (s, 1 H), 11.01 (s, 1 H) 139 BN-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-cyano-3-methylpicolinamide

MS m/z = 431.9 [M]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.81-0.99 (m, 2 H),1.62 (q, J = 7.70 Hz, 1 H), 2.56 (s, 3 H), 3.96 (br. s., 1 H), 4.71 (dq,J = 47.9, 9.0 Hz, 2 H), 5.63 (br. s., 2 H), 7.87 (s, 1 H), 7.99 (d, J =11.15 Hz, 1 H), 8.41 (s, 1 H), 8.99 (s, 1 H), 11.01 (s, 1 H) 140 BN-(3-((1R/S,5S/R,6R/S)- 3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 448 [M + H]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.85-1.01 (m, 2H), 1.63 (dt, J = 9.73, 7.07 Hz, 1 H), 3.66 (t, J = 2.35 Hz, 1 H),3.98-4.07 (m, 1 H), 4.55- 4.88 (m, 2 H), 5.16 (d, J = 2.54 Hz, 2 H),5.63 (s, 2 H), 8.02 (dd, J = 11.25, 2.45 Hz, 1 H), 8.10 (s, 1 H), 8.51(d, J = 1.17 Hz, 1 H), 8.94 (d, J = 1.37 Hz, 1 H), 10.82 (s, 1 H) 141 BN-(3- (((1S,R),(5S,R),(6R,S))- 3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-5-fluoro-4- (methylthio)phenyl)-5-chloropicolinamide

MS m/z = 439 [M + H]+ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.90-1.06 (m, 1 H)1.14-1.33 (m, 1 H) 1.75 (m, 1 H) 3.40 (s, 3 H) 3.78-3.92 (m, 1 H)4.55-4.76 (m, 1 H) 4.81 (m, 1 H) 5.67 (br. s., 2 H) 8.06 (d, J = 14.48Hz, 1 H) 8.15-8.26 (m, 2 H) 8.30 (s, 1 H) 8.82 (s, 1 H) 11.12 (br. s., 1H) 142 B N-(3- (((1R,S),(5S,R),(6R,S))- 3-amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5-difluorophenyl)-5- chloropicolinamide

MS m/z = 410 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) Shift = 10.00 (br. s.,1 H), 8.58 (s, 1 H), 8.23 (d, J = 8.6 Hz, 1 H), 8.11-8.00 (m, 1 H), 7.90(d, J = 8.4 Hz, 1 H), 4.78-4.67 (m, 1 H), 4.69-4.58 (m, 1 H), 4.09-3.95(m, 1 H), 1.80-1.74 (m, 1 H), 1.24 (t, J = 6.9 Hz, 1 H), 1.03-0.91 (m, 1H) 143 D N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 408 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d = 9.51 (s, 1 H),9.01 (s, 1 H), 8.15 (s, 1 H), 8.08 (ddd, J = 2.5, 6.8, 11.7 Hz, 1 H),4.79-4.69 (m, 1 H), 4.67-4.57 (m, 1 H), 4.05 (s, 3H), 4.00 (t, J = 6.2Hz, 1 H), 1.80- 1.71 (m, 1 H), 1.21 (dt, J = 2.6, 7.0 Hz, 1 H),1.01-0.92 (m, 1 H) 144 D N-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4,5- difluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 407.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) d 9.47 (br. s., 1H),8.99 (s, 1H), 8.12 (s, 1H), 7.99- 8.09 (m, 1H), 4.55-4.82 (m, 2H), 4.07(s, 3H), 3.98 (br. s., 1H), 1.74 (q, J = 7.69 Hz, 1H), 1.16-1.26 (m,1H), 0.88-1.02 (m, 1H) 145 D N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-5-fluoro-4- methoxyphenyl)-5-chloropicolinamide

MS m/z = 422.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) d 9.78 (br. s., 1H),8.54 (s, 1H), 8.22 (d, J = 8.22 Hz, 1H), 8.00 (d, J = 13.69 Hz, 1H),7.87 (d, J = 8.41 Hz, 1H), 7.24 (br. s., 1H), 4.64-4.84 (m, 2H), 3.99(s, 3H), 3.94 (br. s., 1H), 1.72-1.82 (m, 1H), 1.15 (t, J = 6.65 Hz,1H), 0.89 (q, J = 7.63 Hz, 1H) 146 D N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoro-4- methoxyphenyl)-5- chloropicolinamide

MS m/z = 422.9 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) d 9.77 (br. s., 1H),8.53 (s, 1H), 8.22 (d, J = 8.41 Hz, 1H), 7.99 (d, J = 13.50 Hz, 1H),7.87 (d, J = 8.22 Hz, 1H), 7.24 (br. s., 1H), 4.63-4.91 (m, 2H), 3.99(s, 3H), 3.93 (br. s., 1H), 1.77 (q, J = 7.89 Hz, 1H), 1.15 (t, J = 6.85Hz, 1H), 0.89 (q, J = 7.37 Hz, 1H) 147 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- isopropoxypyrazine-2- carboxamide

MS m/z = 436 [M + H]+ 1H NMR (300 MHz, DMSO-d6) d ppm 10.50 (s, 1 H),8.86 (d, J = 1.32 Hz, 1 H), 8.33 (d, J = 1.32 Hz, 1 H), 8.03 (dd, J =7.09, 2.56 Hz, 1 H), 7.77- 7.93 (m, 1 H), 7.21 (dd, J = 11.84, 8.92 Hz,1 H), 5.96-6.52 (m, 1 H), 5.85 (br. s., 2 H), 5.36 (spt, J = 6.16 Hz, 1H), 4.03 (br. s., 1 H), 1.73 (d, J = 7.45 Hz, 1 H), 1.37 (d, J = 6.14Hz, 6 H), 1.16 (d, J = 5.99 Hz, 1 H), 0.92 (d, J = 8.04 Hz, 1 H) 148 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-((R)- but-3-yn-2-yloxy)pyrazine-2- carboxamide

MS m/z = 446 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d ppm 10.55 (s, 1 H),8.90 (d, J = 1.32 Hz, 1 H), 8.45 (d, J = 1.17 Hz, 1 H), 8.04 (dd, J =7.02, 2.63 Hz, 1 H), 7.76- 7.93 (m, 1 H), 7.21 (dd, J = 11.84, 8.92 Hz,1 H), 5.97-6.46 (m, 1 H), 5.72- 5.92 (m, 3 H), 3.98-4.10 (m, 1 H), 3.59(d, J = 2.05 Hz, 1 H), 1.67-1.81 (m, 1 H), 1.63 (d, J = 6.58 Hz, 3 H),1.05-1.26 (m, 1 H), 0.92 (dt, J = 9.21, 6.50 Hz, 1 H) 149 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2-(difluoromethyl)thiazole- 4-carboxamide

MS m/z = 433[M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d ppm 10.47 (s, 1 H),8.72 (s, 1 H), 7.96 (dd, J = 7.09, 2.70 Hz, 1 H), 7.79 (ddd, J = 8.84,4.17, 2.78 Hz, 1 H), 7.43 (t, J = 54.08 Hz, 1 H), 7.21 (dd, J = 11.91,8.84 Hz, 1 H), 6.19 (t, J = 55.83 Hz, 1 H), 5.85 (s, 2 H), 3.94-4.11 (m,1 H), 1.72 (dt, J = 9.28, 6.83 Hz, 1 H), 1.07- 1.26 (m, 1 H), 0.91 (dt,J = 9.32, 6.45 Hz, 1 H) 150 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-2- (difluoromethyl)oxazole- 4-carboxamide 2,2,2-trifluoroacetate

MS m/z = 416.9 [M + H]⁺ 1H NMR (400 MHz, CD3OD) d ppm 8.75 (s, 1 H),8.16 (dd, J = 7.04, 2.54 Hz, 1 H), 7.84 (ddd, J = 9.00, 4.30, 2.54 Hz, 1H), 7.37 (dd, J = 11.84, 8.90 Hz, 1 H), 7.04 (t, J = 51.84 Hz, 1 H),6.69 (t, J = 53.60 Hz, 1 H), 4.65 (td, J = 6.70, 2.84 Hz, 1 H), 2.26(dt, J = 9.73, 7.07 Hz, 1 H), 1.70 (t, J = 7.63 Hz, 1 H), 1.41 (td, J =9.05, 6.36 Hz, 1 H) 151 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-2- (cyclopropylethynyl) oxazole-4-carboxamide

MS m/z = 431 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.30 (s, 1 H),8.75 (s, 1 H), 7.97 (dd, J = 7.04, 2.74 Hz, 1 H), 7.69-7.82 (m, 1 H),7.18 (dd, J = 11.84, 8.90 Hz, 1 H), 6.18 (t, J = 56.14 Hz, 1 H), 5.83(br. s., 2 H), 4.01 (t, J = 5.48 Hz, 1 H), 1.62-1.80 (m, 2 H), 1.09-1.19(m, 1 H), 0.98-1.09 (m, 2 H), 0.81-0.95 (m, 3 H) 152 B N-(3-([1(S,R),5(R,S),6(S,R)]- 3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-methoxypyrazine-2- carboxamide compound with N-(3-((1S,5R,6S)-3-amino-5- (fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-4-chloro-5- fluorophenyl)-5- methoxypyrazine-2- carboxamide(1:1)

MS m/z = 424.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 10.77 (s, 1 H),8.91 (d, J = 1.37 Hz, 1 H), 8.43 (d, J = 1.17 Hz, 1 H), 8.08 (s, 1 H),8.00 (dd, J = 11.25, 2.45 Hz, 1 H), 5.62 (br. s., 2 H), 4.47-4.93 (m, 2H), 3.94-4.11 (m, 1 H), 4.03 (s, 3H), 1.52-1.69 (m, 1 H), 0.81-1.04 (m,2 H) 153 B N-(3- ([1(S,R),5(R,S),6(S,R)]- 3-amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5-fluorophenyl)-5- (difluoromethoxy)-3- methylpicolinamide compound withN-(3- ((1S,5R,6S)-3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-(difluoromethoxy)-3- methylpicolinamide (1:1)

MS m/z = 473[M + H]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 11.02 (s, 1 H),10.36 (br. s., 1 H), 8.46 (d, J = 2.35 Hz, 1 H), 8.13 (dd, J = 11.35,2.15 Hz, 1 H), 7.99 (s, 1 H), 7.76 (d, J = 2.15 Hz, 1 H), 7.46 (t, J =73.00 Hz, 1 H), 5.21 (dd, J = 46.36, 9.19 Hz, 1 H), 4.98 (dd, J = 46.36,10.17 Hz, 1 H), 4.61 (m, J = 6.46, 6.46 Hz, 1 H), 3.87 (br. s., 1 H),2.62 (s, 3 H), 1.81-1.97 (m, 1 H), 1.51-1.68 (m, 1 H), 1.05-1.31 (m, 1H) 154 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-(difluoromethyl)-1- methyl-1H-pyrazole-5- carboxamide

MS m/z = 430 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) δ ppm 10.47 (s, 1 H),7.81 (dd, J = 6.87, 2.19 Hz, 1 H), 7.73 (m, J = 8.48, 3.65 Hz, 1 H),7.31 (s, 1 H), 7.22 (dd, J = 11.69, 8.92 Hz, 1 H), 7.07 (t, J = 54.52Hz, 1 H), 6.18 (t, J = 55.98 Hz, 1 H), 5.86 (br. s, 2 H), 4.12 (s, 3 H),4.00 (m, 1 H), 1.61-1.82 (m, 1 H), 1.13 (br. s., 1 H), 0.82-1.01 (m, 1H) 155 B* N-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 424.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 10.77 (s, 1 H),8.91 (d, J = 1.17 Hz, 1 H), 8.43 (d, J = 1.37 Hz, 1 H), 8.08 (s, 1 H),8.00 (dd, J = 11.25, 2.45 Hz, 1 H), 5.63 (br. s., 2 H), 4.46-4.92 (m, 2H), 4.03 (s, 3 H), 3.96-4.02 (m, 1 H), 1.61 (dt, J = 9.68, 7.09 Hz, 1H), 0.95 (td, J = 6.50, 2.64 Hz, 1 H), 0.83- 0.92 (m, 1 H) 156 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 424. [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 10.76 (s, 1 H),8.91 (d, J = 1.37 Hz, 1 H), 8.43 (d, J = 1.17 Hz, 1 H), 8.08 (s, 1 H),8.00 (dd, J = 11.25, 2.45 Hz, 1 H), 5.62 (br. s., 2 H), 4.49-4.94 (m, 2H), 4.03 (s, 3 H), 3.97-4.02 (m, 1 H), 1.61 (dt, J = 9.73, 7.07 Hz, 1H), 0.95 (td, J = 6.60, 2.84 Hz, 1 H), 0.84- 0.92 (m, 1 H) 157 BN-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-(difluoromethoxy)-3- methylpicolinamide

MS m/z = 473.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 10.80 (s, 1 H),8.44 (s, 1 H), 8.01 (d, J = 11.15 Hz, 1 H), 7.90 (br. s., 1 H), 7.73 (s,1 H), 7.44 (t, J = 72.97 Hz, 1 H), 5.63 (br. s., 2 H), 4.55-4.89 (m, 2H), 3.93-4.07 (m, 1 H), 2.60 (s, 3 H), 1.62 (q, J = 7.69 Hz, 1 H), 0.81-1.03 (m, 2 H) 158 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-(difluoromethoxy)-3- methylpicolinamide

MS m/z = 473.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 10.80 (s, 1 H),8.44 (s, 1 H), 8.00 (d, J = 11.15 Hz, 1 H), 7.90 (s, 1 H), 7.73 (s, 1H), 7.44 (t, J = 73.16 Hz, 1 H), 5.62 (s, 2 H), 4.52-4.89 (m, 2 H),3.89-4.06 (m, 1 H), 2.60 (s, 3 H), 1.62 (q, J = 7.69 Hz, 1 H), 0.81-1.01(m, 2 H) 159 B N-(3- ([1(S,R),5(R,S),6(S,R)]- 3-amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5-fluorophenyl)-3-methyl- 5-(2,2,2- trifluoroethoxy)pyrazine-2-carboxamide

MS m/z = 505.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) δ ppm 10.78 (s, 1 H),8.44 (s, 1 H), 8.00 (d, J = 11.40 Hz, 1 H), 7.93 (s, 1 H), 5.63 (s, 2H), 5.14 (q, J = 8.96 Hz, 2 H), 4.78 (dd, J = 28.79, 9.50 Hz, 1 H), 4.63(dd, J = 28.65, 9.06 Hz, 1 H), 3.86- 4.08 (m, 1 H), 2.77 (s, 3 H), 1.50-1.72 (m, 1 H), 0.76-1.05 (m, 2 H) 160 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(2,2,2- trifluoroethoxy)pyrazine- 2-carboxamide

MS m/z = 476.0[M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.86-0.99 (m, 1H) 1.15 (br. s., 1 H) 1.73 (q, J = 7.30 Hz, 1 H) 4.02 (br. s., 1 H) 5.16(q, J = 8.93 Hz, 2 H) 5.85 (br. s., 2 H) 6.00-6.37 (m, 1 H) 7.22 (dd, J= 11.64, 8.90 Hz, 1 H) 7.85 (dt, J = 8.61, 3.42 Hz, 1 H) 8.04 (dd, J =6.94, 2.64 Hz, 1 H) 8.62 (d, J = 1.17 Hz, 1 H) 8.92 (d, J = 1.17 Hz, 1H) 10.62 (s, 1 H) 161 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-4-chloro- 1-isopropyl-1H- pyrazole-3-carboxamide

MS m/z = 442.0[M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.91 (dt, J =9.24, 6.53 Hz, 1 H) 1.09-1.19 (m, 1 H) 1.47 (d, J = 6.65 Hz, 5 H)1.67-1.76 (m, 1 H) 3.97- 4.04 (m, 1 H) 4.07 (q, J = 5.15 Hz, 1 H) 4.57(quin, J = 6.70 Hz, 1 H) 5.84 (s, 1 H) 6.00-6.35 (m, 1 H) 7.18 (dd, J =11.84, 8.90 Hz, 1 H) 7.68-7.79 (m, 1 H) 7.87 (dd, J = 7.04, 2.54 Hz, 1H) 8.22 (s, 1 H) 10.06 (s, 1 H) 162 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-((S)-but- 3-yn-2-yloxy)pyrazine- 2-carboxamide

MS m/z = 446.0 [M + H]⁺ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.93 (br. s., 1H) 1.73 (d, J = 5.87 Hz, 2 H) 3.59 (d, J = 2.15 Hz, 1 H) 5.73-5.91 (m, 3H) 5.98-6.41 (m, 1 H) 7.22 (t, J = 10.37 Hz, 1 H) 7.86 (d, J = 8.02 Hz,1 H) 8.04 (d, J = 4.89 Hz, 1 H) 8.45 (d, J = 1.37 Hz, 1 H) 8.90 (d, J =1.17 Hz, 1 H) 10.55 (br. s., 1 H) 163 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-4-chloro- 1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 449.9 [M + H]⁺ ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.92 (br. s., 1H) 1.14 (br. s., 1 H) 1.71 (br. s., 1 H) 4.01 (br. s., 1 H) 5.86 (br.s., 2 H) 5.97-6.40 (m, 1 H) 7.21 (t, J = 9.68 Hz, 1 H) 7.66-7.82 (m, 1H) 7.88 (s, 2 H) 8.77 (s, 1 H) 10.57 (br. s., 1 H) 164 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-4-chloro-1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 431.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.84 (dt, J =9.5, 6.4 Hz, 1 H), 0.95-1.06 (m, 1 H), 1.50-1.62 (m, 1 H), 3.97-4.08 (m,1 H), 4.41-4.73 (m, 2 H), 7.17 (dd, J = 11.9, 8.8 Hz, 1 H), 7.67-8.05(m, 1 H), 7.84 (dd, J = 7.0, 2.5 Hz, 1 H), 7.88 (t, J = 58.5 Hz, 1 H),8.76 (s, 1 H), 10.54 (s, 1 H) 165 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(thiazol- 2-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 491.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 1.03-1.14(m, 1 H) 1.26 (s, 1 H) 1.44-1.53 (m, 1 H) 1.90-2.03 (m, 1 H) 4.07 (br.s., 1 H) 5.81 (s, 1 H) 6.10-6.44 (m, 1 H) 7.16 (dd, J = 11.54, 9.00 Hz,1 H) 7.42 (d, J = 3.13 Hz, 1 H) 7.69 (dd, J = 6.75, 2.64 Hz, 1 H) 7.85(d, J = 3.13 Hz, 1 H) 7.98-8.06 (m, 1 H) 8.28 (d, J = 1.17 Hz, 1 H) 9.05(d, J = 1.17 Hz, 1 H) 9.54 (s, 1 H) 166 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-2- methyloxazole-4- carboxamide

MS m/z = 380.9 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.91-1.06(m, 1 H) 1.43 (t, J = 6.75 Hz, 1 H) 1.88 (dt, J = 9.49, 7.09 Hz, 1 H)2.50 (s, 3 H) 3.90-4.02 (m, 1 H) 6.05-6.42 (m, 1 H) 7.08 (dd, J = 11.54,8.80 Hz, 1 H) 7.62 (dd, J = 6.75, 2.64 Hz, 1 H) 7.90 (ddd, J = 8.75,4.06, 2.84 Hz, 1 H) 8.15 (s, 1 H) 8.65 (s, 1 H) 167 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(oxazol-2-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 475.0 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.86-0.97 (m, 1H) 1.15 (br. s., 1 H) 1.67-1.78 (m, 1 H) 3.96-4.05 (m, 1 H) 5.61 (s, 2H) 5.84 (s, 2 H) 6.01-6.36 (m, 1 H) 7.21 (dd, J = 11.83, 8.90 Hz, 1 H)7.29 (d, J = 0.59 Hz, 1 H) 7.85 (dt, J = 7.29, 4.18 Hz, 1 H) 8.03 (dd, J= 7.14, 2.64 Hz, 1 H) 8.19 (d, J = 0.78 Hz, 1 H) 8.53 (d, J = 1.37 Hz, 1H) 8.88 (d, J = 1.37 Hz, 1 H) 10.56 (s, 1 H) 168 N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-2- (fluoromethyl)oxazole-4- carboxamide

MS m/z = 398.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.91 (dt, J =9.39, 6.46 Hz, 1 H) 1.07-1.19 (m, 1 H) 1.64-1.77 (m, 1 H) 3.96-4.06 (m,1 H) 5.48-5.71 (m, 2 H) 5.84 (s, 2 H) 6.00-6.37 (m, 1 H) 7.19 (dd, J =11.74, 8.80 Hz, 1 H) 7.73- 7.82 (m, 1 H) 7.96 (dd, J = 7.14, 2.64 Hz, 1H) 8.88 (d, J = 1.56 Hz, 1 H) 10.34 (s, 1 H) 169 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(thiazol- 4-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 490.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.91 (dt, J =9.39, 6.36 Hz, 1 H) 1.15 (t, J = 4.89 Hz, 1 H) 1.64-1.78 (m, 1 H) 4.02(t, J = 5.38 Hz, 1 H) 5.62 (s, 2 H) 5.85 (s, 2 H) 6.02-6.37 (m, 1 H)7.21 (dd, J = 11.84, 8.90 Hz, 1 H) 7.80-7.87 (m, 1 H) 7.88 (d, J = 1.76Hz, 1 H) 8.03 (dd, J = 7.04, 2.74 Hz, 1 H) 8.47 (d, J = 1.17 Hz, 1 H)8.91 (d, J = 1.17 Hz, 1 H) 9.15 (d, J = 1.96 Hz, 1 H) 10.54 (s, 1 H) 170B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(thiazol-5-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 490.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.86-1.00 (m, 1H) 1.15 (br. s., 1 H) 1.65-1.79 (m, 1 H) 3.96-4.08 (m, 1 H) 5.78 (s, 2H) 5.84 (s, 2 H) 6.01-6.37 (m, 1 H) 7.21 (dd, J = 11.83, 8.71 Hz, 1 H)7.85 (dt, J = 7.29, 4.18 Hz, 1 H) 8.03 (dd, J = 7.14, 2.64 Hz, 1 H) 8.10(d, J = 0.59 Hz, 1 H) 8.46 (d, J = 1.37 Hz, 1 H) 8.93 (d, J = 1.37 Hz, 1H) 9.15 (s, 1 H) 10.55 (s, 1 H) 171 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(oxazol- 5-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 475.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 1.12-1.23(m, 1 H) 1.53-1.67 (m, 1 H) 2.01- 2.17 (m, 1 H) 4.15-4.29 (m, 1 H) 5.54(s, 2 H) 6.15-6.51 (m, 1 H) 7.18 (dd, J = 11.54, 9.00 Hz, 1 H) 7.76 (dd,J = 6.65, 2.54 Hz, 1 H) 7.93 (s, 1 H) 7.98 (dt, J = 8.80, 3.42 Hz, 1 H)8.21 (d, J = 1.17 Hz, 1 H) 9.03 (d, J = 1.17 Hz, 1 H) 9.56 (s, 1 H) 172B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(thiazol- 2-ylmethoxy)picolinamide

MS m/z = 490.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.99 (q, J= 7.69 Hz, 1 H) 1.44 (br. s., 1 H) 1.89 (q, J = 7.69 Hz, 1 H) 3.97 (br.s., 1 H) 5.52 (s, 2 H) 6.09-6.43 (m, 1 H) 7.10 (t, J = 10.17 Hz, 1 H)7.45 (br. s., 1 H) 7.48 (d, J = 8.80 Hz, 1 H) 7.65 (d, J = 6.65 Hz, 1 H)7.86 (br. s., 1 H) 8.01 (d, J = 7.82 Hz, 1 H) 8.22 (d, J = 8.80 Hz, 1 H)8.35 (s, 1 H) 9.81 (s, 1 H) 173 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(oxazol- 2- ylmethoxy)picolinamide

MS m/z = 474. 0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.89-1.05(m, 1 H) 1.44 (br. s., 1 H) 1.88 (q, J = 7.76 Hz, 1 H) 3.91-4.15 (m, 3H) 5.29 (s, 2 H) 6.08-6.44 (m, 1 H) 7.10 (t, J = 10.47 Hz, 1 H) 7.21 (s,1 H) 7.50 (d, J = 8.61 Hz, 1 H) 7.66 (d, J = 6.46 Hz, 1 H) 7.74 (s, 1 H)7.94-8.05 (m, 1 H) 8.23 (d, J = 8.61 Hz, 1 H) 8.35 (s, 1 H) 9.81 (s, 1H) 174 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(oxazol-4-ylmethoxy)pyrazine-2- carboxamide

MS m/z = 475.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.94-1.06(m, 1 H) 1.38-1.48 (m, 1 H) 1.82- 1.98 (m, 1 H) 3.93-4.05 (m, 1 H) 5.47(s, 2 H) 6.06-6.42 (m, 1 H) 7.12 (dd, J = 11.54, 9.00 Hz, 1 H) 7.65 (dd,J = 6.65, 2.54 Hz, 1 H) 7.82 (s, 1 H) 7.94 (s, 1 H) 7.99 (dt, J = 8.51,3.47 Hz, 1 H) 8.19 (s, 1 H) 9.02 (s, 1 H) 9.48 (s, 1 H) 175 BN-(3-((1R,5S,6R)-3- amino-5-N (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2-(1-fluoroethyl)oxazole-4- carboxamide 2,2,2- trifluoroacetate

MS m/z = 413.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 1.31-1.44(m, 1 H) 1.72 (br. s., 1 H) 1.77-1.92 (m, 2 H) 2.16-2.30 (m, 1 H) 4.42(br. s., 1 H) 5.58-5.82 (m, 1 H) 6.23- 6.59 (m, 1 H) 7.21 (t, J = 10.27Hz, 1 H) 7.83 (d, J = 7.04 Hz, 1 H) 8.33 (s, 1 H) 8.84 (br. s., 1 H)120768-50-1 176 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-4-methylthiophene-2- carboxamide

MS m/z = 395.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.90 (q, J =6.91 Hz, 1 H) 1.13 (br. s., 1 H) 1.64-1.79 (m, 1 H) 2.27 (s, 3 H) 4.00(br. s., 1 H) 5.84 (s, 2 H) 5.97- 6.37 (m, 1 H) 7.19 (t, J = 10.27 Hz, 1H) 7.44 (s, 1 H) 7.69 (d, J = 7.04 Hz, 1 H) 7.83 (br. s., 2 H) 10.27 (s,1 H) 177 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-4-chlorothiophene-2- carboxamide

MS m/z = 415.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.90 (dt, J =9.29, 6.50 Hz, 1 H) 1.08-1.18 (m, 1 H) 1.72 (dt, J = 9.34, 6.87 Hz, 1 H)3.95-4.04 (m, 1 H) 5.86 (s, 2 H) 6.00-6.35 (m, 1 H) 7.22 (dd, J = 11.74,8.80 Hz, 1 H) 7.64- 7.74 (m, 1 H) 7.82 (dd, J = 6.94, 2.64 Hz, 1 H) 7.91(d, J = 1.37 Hz, 1 H) 8.03 (d, J = 1.37 Hz, 1 H) 10.42 (s, 1 H) 178 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-4-cyanothiophene-2- carboxamide

MS m/z = 406.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 0.82-0.98 (m, 1H) 1.13 (br. s., 1 H) 1.64-1.79 (m, 1 H) 3.99 (br. s., 1 H) 5.86 (s, 2H) 5.99-6.35 (m, 1 H) 7.23 (t, J = 10.66 Hz, 1 H) 7.69 (br. s., 1 H)7.80 (d, J = 6.65 Hz, 1 H) 8.32 (s, 1 H) 8.80 (s, 1 H) 10.54 (s, 1 H)179 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chlorothiophene-2- carboxamide

MS m/z = 415.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 1.28 (d, J =5.48 Hz, 1 H) 1.62 (br. s., 1 H) 2.09 (d, J = 6.46 Hz, 1 H) 3.43 (br.s., 1 H) 4.67 (br. s., 1 H) 6.55- 6.92 (m, 1 H) 7.30 (br. s., 1 H) 7.42(t, J = 10.07 Hz, 1 H) 7.81 (br. s., 1 H) 8.05 (br. s., 2 H) 10.70 (br.s., 2 H) 180 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(fluoromethoxy)picolin- amide

MS m/z = 425.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.96-1.10(m, 1 H) 1.46 (br. s., 1 H) 1.93 (q, J = 8.09 Hz, 1 H) 4.02 (br. s., 1H) 5.69-5.94 (m, 2 H) 6.07-6.44 (m, 1 H) 7.13 (t, J = 10.27 Hz, 1 H)7.57 (d, J = 8.80 Hz, 1 H) 7.69 (d, J = 7.04 Hz, 1 H) 8.02 (d, J = 7.63Hz, 1 H) 8.28 (d, J = 8.41 Hz, 1 H) 8.41 (s, 1 H) 9.85 (br. s., 1 H) 181B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chlorothiophene-3- carboxamide

MS m/z = 416.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.99 (d, J= 7.43 Hz, 1 H) 1.36 (br. s., 1 H) 1.87 (q, J = 7.76 Hz, 1 H) 3.93 (br.s., 1 H) 6.02-6.39 (m, 1 H) 7.01-7.11 (m, 1 H) 7.14 (d, J = 6.26 Hz, 1H) 7.46 (s, 1 H) 7.94 (s, 1 H) 8.13 (br. s., 1 H) 182 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(methylsulfonyl)picolin- amide

MS m/z = 455.1 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.96-1.07(m, 1 H) 1.45 (br. s., 1 H) 1.85-1.97 (m, 1 H) 3.18 (s, 3 H) 3.94-4.02(m, 1 H) 6.07-6.42 (m, 1 H) 7.13 (dd, J = 11.15, 9.00 Hz, 1 H) 7.72 (dd,J = 6.55, 2.25 Hz, 1 H) 7.97-8.06 (m, 1 H) 8.41-8.52 (m, 2 H) 9.13 (s, 1H) 9.90 (s, 1 H) 183 C N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-(fluoromethoxy)picolin- amide

MS m/z = 422.9 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.98 (dt, J= 9.78, 6.65 Hz, 1 H) 1.17 (td, J = 7.04, 2.74 Hz, 1 H) 1.99 (dt, J =9.88, 7.19 Hz, 1 H) 3.89-3.99 (m, 1 H) 4.75- 5.01 (m, 2 H) 5.69-5.93 (m,2 H) 7.42 (d, J = 8.80 Hz, 1 H) 7.58 (dd, J = 8.61, 2.74 Hz, 1 H) 7.83(d, J = 2.74 Hz, 1 H) 8.01 (dd, J = 8.61, 2.54 Hz, 1 H) 8.28 (d, J =8.80 Hz, 1 H) 8.41 (d, J = 2.74 Hz, 1 H) 9.88 (s, 1 H) 184 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(cyanomethoxy)-3- methylpicolinamide

MS m/z = 446.0 [M + H]⁺ 1H NMR (400 MHz, ACETONITRILE-d3) d ppm 1.18-1.31 (m, 1 H) 1.57 (br. s., 1 H) 2.04- 2.12 (m, 2 H) 2.73 (s, 3 H) 3.28(s, 1 H) 4.39 (br. s., 1 H) 5.02 (s, 2 H) 6.26- 6.65 (m, 1 H) 7.25 (t, J= 10.47 Hz, 1 H) 7.38 (br. s., 1 H) 7.84 (d, J = 7.04 Hz, 1 H) 7.94 (br.s., 1 H) 8.25 (br. s., 1 H) 10.10 (br. s., 1 H) 185 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3,5-dimethylpicolinamide

MS m/z = 405.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.99 (q, J= 7.50 Hz, 1 H) 1.43 (br. s., 1 H) 1.91 (q, J = 7.82 Hz, 1 H) 2.39 (s, 3H) 2.76 (s, 3 H) 3.98 (br. s., 1 H) 6.05-6.45 (m, 1 H) 7.10 (t, J =10.27 Hz, 1 H) 7.43 (s, 1 H) 7.54 (d, J = 6.85 Hz, 1 H) 8.08 (d, J =8.22 Hz, 1 H) 8.24 (s, 1 H) 10.19 (br. s., 1 H) 186 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(difluoromethyl)-3- methylpicolinamide

MS m/z = 440.9 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 0.95-1.07(m, 1 H) 1.39-1.52 (m, 1 H) 1.85- 1.99 (m, 1 H) 2.85 (s, 3 H) 3.98 (t, J= 5.38 Hz, 1 H) 6.04-6.43 (m, 1 H) 6.55-6.95 (m, 1 H) 7.09 (dd, J =11.35, 9.00 Hz, 1 H) 7.57 (dd, J = 6.55, 2.45 Hz, 1 H) 7.78 (s, 1 H)8.04 (dd, J = 7.82, 3.72 Hz, 1 H) 8.54 (s, 1 H) 10.11 (s, 1 H) 187 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-6-methoxypyridazine-3- carboxamide

MS m/z = 408.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 1.02 (q, J= 7.82 Hz, 1 H) 1.46 (br. s., 1 H) 1.89 (q, J = 7.82 Hz, 1 H) 3.95-4.07(m, 1 H) 4.24 (s, 3 H) 6.07-6.45 (m, 1 H) 7.09-7.21 (m, 2 H) 7.69 (d, J= 6.26 Hz, 1 H) 8.01 (d, J = 8.61 Hz, 1 H) 8.28 (d, J = 9.00 Hz, 1 H)9.89 (br. s., 1 H) 188 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3-methyl- 5- (trifluoromethyl)picolin- amide

MS m/z = 459.0 [M + H]⁺ 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.93-1.08(m, 1 H) 1.45 (br. s., 1 H) 1.84-2.00 (m, 1 H) 2.87 (s, 3 H) 3.98 (br.s., 1 H) 5.99-6.47 (m, 1 H) 6.99-7.16 (m, 1 H) 7.57 (d, J = 6.87 Hz, 1H) 7.89 (s, 1 H) 7.95-8.10 (m, 1 H) 8.65 (s, 1 H) 10.07 (s, 1 H) 189 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-methyl- 5-(2,2,2-trifluoroethoxy)picolin- amide

MS m/z = 489.0 [M + H]⁺ 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.88-1.11(m, 1 H) 1.43 (br. s., 1 H) 1.79-2.00 (m, 1 H) 2.80 (s, 3 H) 3.96 (br.s., 1 H) 4.47 (q, J = 7.80 Hz, 2 H) 5.98-6.50 (m, 1 H) 7.03-7.12 (m, 1H) 7.15 (br. s., 1 H) 7.52 (d, J = 5.99 Hz, 1 H) 7.97- 8.10 (m, 1 H)8.12 (br. s., 1 H) 9.98 (br. s., 1 H) 190 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- methylpicolinamide

MS m/z = 391 0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.98 (q, J= 7.76 Hz, 1 H) 1.43 (br. s., 1 H) 1.89 (q, J = 7.69 Hz, 2 H) 2.44 (s, 3H) 3.97 (br. s., 1 H) 4.56 (br. s., 2 H) 6.05- 6.44 (m, 1 H) 7.11 (t, J= 10.17 Hz, 1 H) 7.69 (d, J = 6.65 Hz, 2 H) 8.02 (d, J = 6.26 Hz, 1 H)8.16 (d, J = 7.82 Hz, 1 H) 8.41 (s, 1 H) 9.96 (br. s., 1 H) 191 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(1,1-difluoroethoxy)picolin- amide

MS m/z = 457.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.95-1.10(m, 1 H) 1.38-1.54 (m, 1 H) 1.92 (dt, J = 9.54, 7.16 Hz, 1 H) 2.02 (t, J= 13.60 Hz, 3 H) 3.91-4.10 (m, 1 H) 5.02 (br. s., 1 H) 6.03-6.47 (m, 1H) 7.11 (dd, J = 11.54, 8.80 Hz, 1 H) 7.67 (dd, J = 6.75, 2.64 Hz, 1 H)7.69-7.73 (m, 1 H) 8.27 (d, J = 8.61 Hz, 1 H) 8.44 (d, J = 1.96 Hz, 1 H)9.85 (s, 1 H) 192 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5- cyanopicolinamide

MS m/z = 384 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.82 (s, 1 H),9.20 (s, 1 H) 8.58 (d, J = 8.22 Hz, 1 H), 8.28 (d, J = 8.22 Hz, 1 H),8.01 (d, J = 6.85 Hz, 1 H), 7.85 (d, J = 7.63 Hz, 1 H), 7.19 (t, J =10.37 Hz, 1 H), 5.65 (br. s., 2 H), 4.40-4.75 (m, 2 H), 4.04 (br. s., 1H), 1.58 (q, J = 7.63 Hz, 1 H), 1.00 (br. s., 1 H), 0.75-0.90 (m, 1 H).193 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-3,5-dichloropicolinamide

MS m/z = 427.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.75 (s, 1 H),8.72 (d, J = 1.96 Hz, 1 H), 8.43 (d, J = 2.15 Hz, 1 H), 7.68-7.82 (m, 2H), 7.19 (dd, J = 11.74, 8.80 Hz, 1 H), 5.73 (br. s., 2 H), 4.37-4.76(m, 2 H), 4.00 (t, J = 5.48 Hz, 1 H), 1.48-1.63 (m, 1 H), 1.00 (td, J =6.46, 2.54 Hz, 1 H), 0.83 (dt, J = 9.39, 6.36 Hz, 1 H). 194 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5- methoxypyrazine-2-carboxamide

MS m/zm/z = 390.2 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.50 (s, 1H), 8.89 (d, J = 1.17 Hz, 1 H), 8.41 (d, J = 1.17 Hz, 1 H), 7.99 (dd, J= 7.34, 2.64 Hz, 1 H), 7.76- 7.87 (m, 1 H), 7.17 (dd, J = 11.93, 8.80Hz, 1 H), 5.79 (br. s., 2 H), 4.39-4.77 (m, 2 H), 3.94-4.12 (m, 4 H),1.43- 1.70 (m, 1 H), 1.02 (td, J = 6.41, 2.64 Hz, 1 H), 0.85 (dt, J =9.44, 6.43 Hz, 1 H). 195 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5-methoxypicolinamide

MS m/z = 389.2 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.44 (s, 1 H),8.39 (d, J = 2.74 Hz, 1 H), 8.12 (d, J = 8.80 Hz, 1 H), 7.96 (dd, J =7.24, 2.74 Hz, 1 H), 7.81- 7.88 (m, 1 H), 7.61 (dd, J = 8.70, 2.84 Hz, 1H), 7.16 (dd, J = 11.74, 8.80 Hz, 1 H), 5.64 (br. s., 2 H), 4.34- 4.75(m, 2 H), 4.03 (t, J = 5.28 Hz, 1 H), 3.93 (s, 3 H), 1.49-1.65 (m, 1 H),0.96-1.04 (m, 1 H), 0.83 (dt, J = 9.34, 6.28 Hz, 1 H). 196 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5-cyano-3-methylpicolinamide

MS m/z = 397.9 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.71 (s, 1 H),8.97 (d, J = 1.37 Hz, 1 H), 8.39 (d, J = 1.17 Hz, 1 H), 7.78-7.86 (m, 2H), 7.18 (dd, J = 11.74, 8.80 Hz, 1 H), 5.70 (br. s., 2 H), 4.32-4.73(m, 2 H), 3.97-4.05 (m, 1 H), 2.54 (s, 3 H), 1.49-1.62 (m, 1 H), 1.00(td, J = 6.46, 2.54 Hz, 1 H), 0.78-0.89 (m, 1 H). 197 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 414.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.53 (s, 1 H),8.90 (s, 1 H), 8.48 (s, 1 H), 7.99 (dd, J = 7.24, 2.35 Hz, 1 H),7.72-7.89 (m, 1 H), 7.17 (dd, J = 11.74, 8.80 Hz, 1 H), 5.69 (br. s.,2H), 5.14 (d, J = 2.35 Hz, 2 H), 4.36- 4.80 (m, 2 H), 3.90-4.12 (m, 1H), 1.50-1.64 (m, 1H), 1.24 (s, 1H), 0.92- 1.06 (m, 1H), 0.84 (dt, J =9.44, 6.43 Hz, 1 H). 198 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5-chloro-3-methylpicolinamide

MS m/z = 407.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.55 (s, 1 H),8.57 (d, J = 1.56 Hz, 1 H), 8.01 (d, J = 0.78 Hz, 1 H), 7.77-7.86 (m, 2H), 7.16 (dd, J = 11.74, 8.80 Hz, 1 H), 5.63 (br. s., 2 H), 4.40-4.71(m, 2 H), 4.00 (t, J = 5.28 Hz, 1 H), 2.55 (s, 3 H), 1.51- 1.61 (m, 1H), 0.95-1.02 (m, 1 H), 0.78-0.88 (m, 1 H). 199 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-fluorophenyl)-5-(but-2- yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 428.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.51 (s, 1 H),8.89 (d, J = 1.17 Hz, 1 H), 8.45 (d, J = 1.37 Hz, 1 H), 7.99 (dd, J =7.34, 2.64 Hz, 1 H), 7.78- 7.85 (m, 1 H), 7.17 (dd, J = 11.74, 8.80 Hz,1 H), 5.63 (br. s., 2 H), 5.09 (d, J = 2.35 Hz, 2 H), 4.39-4.74 (m, 2H), 4.00-4.08 (m, 1 H), 1.86 (t, J = 2.35 Hz, 3 H), 1.53-1.62 (m, 1 H),0.93-1.03 (m, 1 H), 0.83 (dt, J = 9.39, 6.36 Hz, 1 H). 200 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-6-chloro-3-methylimidazo[1,2- a]pyridine-2- carboxamide

MS m/z = 446.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.21 (s, 1 H),8.68 (d, J = 1.17 Hz, 1 H), 7.94 (dd, J = 7.24, 2.54 Hz, 1 H), 7.84 (dt,J = 8.51, 3.47 Hz, 1 H), 7.69 (d, J = 9.59 Hz, 1 H), 7.42 (dd, J = 9.59,1.96 Hz, 1 H), 7.14 (dd, J = 11.84, 8.90 Hz, 1 H), 5.64 (br. s., 2 H),4.39-4.75 (m, 2 H), 4.05 (d, J = 5.28 Hz, 1 H), 2.81 (s, 3 H), 1.53-1.63(m, 1 H), 0.96-1.04 (m, 1 H), 0.84 (dt, J = 9.29, 6.41 Hz, 1 H). 201 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5-(difluoromethyl)-3- methylpicolinamide

MS m/z = 423 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.62 (s, 1 H),8.71 (s, 1 H) 8.04 (s, 1 H), 7.79-7.87 (m, 2 H), 7.07-7.37 (m, 2 H),5.63 (br. s., 2 H), 4.42-4.71 (m, 2 H), 3.96-4.04 (m, 1 H), 2.58 (s, 3H), 1.51-1.61 (m, 1 H), 0.98 (td, J = 6.50, 2.45 Hz, 1 H), 0.83 (dt, J =9.49, 6.41 Hz, 1 H). 202 A N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)isoquinoline- 3-carboxamide

MS m/z = 409.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.75 (s, 1 H),9.48 (s, 1 H), 8.71 (s, 1 H), 8.21-8.34 (m, 2 H), 8.04 (dd, J = 7.24,2.74 Hz, 1 H), 7.89- 7.96 (m, 2 H), 7.82-7.89 (m, 1 H), 7.20 (dd, J =11.93, 8.80 Hz, 1 H), 5.67 (br. s., 2 H), 4.41-4.76 (m, 2 H), 4.05 (d, J= 5.09 Hz, 1 H), 1.53-1.67 (m, 1 H), 0.95-1.07 (m, 1 H), 0.85 (dt, J =9.24, 6.33 Hz, 1 H). 203 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-5-(but-2-yn-1-yloxy)picolinamide

MS m/z = 427.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.46 (s, 1 H),8.42 (d, J = 2.74 Hz, 1 H), 8.13 (d, J = 8.80 Hz, 1 H), 7.97 (dd, J =7.24, 2.54 Hz, 1 H), 7.79-7.89 (m, 1 H), 7.63 (dd, J = 8.71, 2.84 Hz, 1H), 7.16 (dd, J = 11.74, 8.80 Hz, 1 H), 5.68 (br. s., 2 H), 4.96 (d, J =2.15 Hz, 2 H), 4.39-4.75 (m, 2 H), 4.04 (t, J = 5.58 Hz, 1 H), 1.85 (t,J = 2.25 Hz, 3 H), 1.52-1.63 (m, 1 H), 1.00 (td, J = 6.26, 2.35 Hz, 1H), 0.84 (dt, J = 9.49, 6.31 Hz, 1 H). 204 A N-(5-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-6-fluoropyridin- 3-yl)-5- cyanopicolinamide

MS m/z = 385 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 11.21 (s, 1 H),9.17-9.26 (m, 1 H), 8.64 (s, 1 H), 8.58 (ddd, J = 16.38, 8.56, 2.05 Hz,2 H), 8.30 (d, J = 8.22 Hz, 1 H), 5.72 (s, 2 H), 4.44- 4.71 (m, 2 H),4.01-4.10 (m, 1 H), 1.49-1.62 (m, 1 H), 1.00 (td, J = 6.46, 2.54 Hz, 1H), 0.86 (dt, J = 9.54, 6.38 Hz, 1 H). 205 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-fluorophenyl)-5-(prop-2- yn-1-yloxy)picolinamide

MS m/z = 413 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.46 (s, 1 H),8.44 (d, J = 2.74 Hz, 1 H), 8.14 (d, J = 8.61 Hz, 1 H), 7.97 (dd, J =7.24, 2.54 Hz, 1 H), 7.79- 7.88 (m, 1 H), 7.66 (dd, J = 8.70, 2.84 Hz, 1H), 7.16 (dd, J = 11.74, 8.80 Hz, 1 H), 5.63 (br. s., 2 H), 5.03 (d, J =2.35 Hz, 2 H), 4.39-4.74 (m, 2 H), 4.03 (t, J = 5.38 Hz, 1 H), 3.70 (t,J = 2.35 Hz, 1 H), 1.53-1.62 (m, 1 H), 0.99 (td, J = 6.36, 2.54 Hz, 1H), 0.83 (dt, J = 9.49, 6.41 Hz, 1 H). 206 A N-(5-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-6-fluoropyridin- 3-yl)-5-(prop-2-yn-1- yloxy)pyrazine-2-carboxamide

MS m/z = 415.1 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.92 (s, 1 H),8.92 (d, J = 1.37 Hz, 1 H), 8.59-8.62 (m, 1 H), 8.54 (dd, J = 9.10, 2.64Hz, 1 H), 8.50 (d, J = 1.37 Hz, 1 H), 5.72 (s, 2 H), 5.14 (d, J = 2.35Hz, 2 H), 4.45-4.70 (m, 2 H), 4.07 (d, J = 2.54 Hz, 1 H), 3.64 (t, J =2.35 Hz, 1 H), 1.55 (dt, J = 9.19, 6.94 Hz, 1 H), 1.00 (td, J = 6.46,2.54 Hz, 1 H), 0.86 (dt, J = 9.49, 6.50 Hz, 1 H). 207 AN-(5-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-6-fluoropyridin- 3-yl)-4-chloro-1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 433 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d ppm 10.84 (s, 1 H),8.78 (s, 1 H) 8.53 (s, 1 H), 8.38 (dd, J = 9.10, 2.45 Hz, 1 H),7.72-8.07 (m, 1 H), 5.74 (br. s., 2 H), 4.44-4.69 (m, 2 H), 4.04 (t, J =5.38 Hz, 1 H), 1.48-1.60 (m, 1 H), 0.94-1.04 (m, 1 H), 0.86 (dt, J =9.44, 6.43 Hz, 1 H). 208 B N-(3- ([1(R,S),5(S,R),6(R,S)]- 3-amino-5-(trifluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)phenyl)-5-chloropicolinamide

MS m/z = 410.9 [M + H]⁺ 1H NMR (300 MHz, CHLOROFORM-d) d = 9.88 (s, 1H), 8.58 (d, J = 2.0 Hz, 1 H), 8.26 (d, J = 8.3 Hz, 1 H), 7.98 (s, 1 H),7.93-7.79 (m, 2 H), 7.48-7.39 (m, 2 H), 4.53 (br. s., 2 H), 4.03-3.98(m, 1 H), 1.91 (td, J = 7.0, 9.7 Hz, 1 H), 1.53 (t, J = 6.4 Hz, 1 H),1.12-0.99 (m, 1 H). 209 A N-(3- ([1R,S),5(S,R),6(R,S)]- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5- (difluoromethoxy)-3- methylpicolinamide

MS m/z = 472.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.61 (s, 1 H),8.43 (d, J = 2.5 Hz, 1 H), 8.07 (d, J = 2.5 Hz, 1 H), 7.89 (dd, J = 2.6,8.6 Hz, 1 H), 7.72 (d, J = 2.3 Hz, 1 H), 7.69-7.12 (m, 2 H), 6.95- 6.48(m, 1 H), 5.84 (s, 2 H), 4.03- 3.88 (m, 1 H), 2.59 (s, 3 H), 1.87 (td, J= 7.0, 9.6 Hz, 1 H), 1.08 (br. s., 1 H), 0.94 (td, J = 6.4, 9.5 Hz, 1H). 210 A N-(3- ([1(R,S),5(S,R),6(R,S)]- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5-(but-2- yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 461.8 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.59 (s, 1 H),8.89 (d, J = 1.2 Hz, 1 H), 8.46 (d, J = 1.3 Hz, 1 H), 8.22 (d, J = 2.6Hz, 1 H), 7.89 (dd, J = 2.6, 8.6 Hz, 1 H), 7.45 (d, J = 8.6 Hz, 1 H),6.96-6.43 (m, 1 H), 5.91-5.75 (m, 2 H), 5.09 (q, J = 2.2 Hz, 2 H), 4.04-3.89 (m, 1 H), 1.94-1.77 (m, 4 H), 1.10 (s, 1 H), 0.94 (td, J = 6.4, 9.5Hz, 1 H). 211 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-3,5-dichloropicolinamide

MS m/z = 460.8 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.88 (br. s., 1H), 8.73 (d, J = 1.9 Hz, 1 H), 8.45 (d, J = 2.0 Hz, 1 H), 7.97 (d, J =2.6 Hz, 1 H), 7.86 (dd, J = 2.6, 8.6 Hz, 1 H), 7.48 (d, J = 8.6 Hz, 1H), 6.93-6.50 (m, 1 H), 5.87 (s, 2 H), 4.01-3.87 (m, 1 H), 1.87 (td, J =6.9, 9.6 Hz, 1 H), 1.06 (br. s., 1 H), 0.94 (td, J = 6.4, 9.4 Hz, 1 H).212 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-(difluoromethoxy)-3- methylpicolinamide

MS m/z = 472.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.61 (s, 1 H),8.43 (d, J = 2.5 Hz, 1 H), 8.07 (d, J = 2.5 Hz, 1 H), 7.89 (dd, J = 2.6,8.6 Hz, 1 H), 7.72 (d, J = 2.2 Hz, 1 H), 7.69-7.11 (m, 2 H), 6.97- 6.45(m, 1 H), 5.84 (s, 2 H), 4.02- 3.87 (m, 1 H), 2.59 (s, 3 H), 1.87 (td, J= 7.0, 9.5 Hz, 1 H), 1.14-1.02 (m, 1 H), 0.94 (td, J = 6.4, 9.5 Hz, 1H). 213 A N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-(difluoromethoxy)-3- methylpicolinamide

MS m/z = 472.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.61 (s, 1 H),8.43 (d, J = 2.5 Hz, 1 H), 8.07 (d, J = 2.5 Hz, 1 H), 7.89 (dd, J = 2.6,8.7 Hz, 1 H), 7.72 (d, J = 2.3 Hz, 1 H), 7.69-7.09 (m, 2 H), 6.96- 6.44(m, 1 H), 5.84 (s, 2 H), 4.02- 3.86 (m, 1 H), 2.59 (s, 3 H), 1.87 (td, J= 7.0, 9.6 Hz, 1 H), 1.15-1.02 (m, 1 H), 0.94 (td, J = 6.4, 9.5 Hz, 1H). 214 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-bromopicolinamide

MS m/z = 470.7 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.74 (s, 1 H),8.87 (dd, J = 0.7, 2.3 Hz, 1 H), 8.33 (dd, J = 2.3, 8.4 Hz, 1 H), 8.22(d, J = 2.6 Hz, 1 H), 8.08 (dd, J = 0.6, 8.5 Hz, 1 H), 7.91 (dd, J =2.6, 8.6 Hz, 1 H), 7.46 (d, J = 8.6 Hz, 1 H), 6.95-6.46 (m, 1 H), 5.84(s, 2 H), 4.02-3.91 (m, 1 H), 1.88 (td, J = 6.8, 9.7 Hz, 1 H), 1.14-1.04(m, 1 H), 0.94 (td, J = 6.4, 9.5 Hz, 1 H). 215 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5-(but-2- yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 461.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.59 (s, 1 H),8.89 (d, J = 1.3 Hz, 1 H), 8.46 (d, J = 1.3 Hz, 1 H), 8.22 (d, J = 2.5Hz, 1 H), 7.89 (dd, J = 2.6, 8.6 Hz, 1 H), 7.45 (d, J = 8.6 Hz, 1 H),6.98-6.41 (m, 1 H), 5.83 (s, 2 H), 5.09 (q, J = 2.2 Hz, 2 H), 4.05-3.88(m, 1 H), 1.95-1.74 (m, 4 H), 1.09 (br. s., 1 H), 0.94 (td, J = 6.4, 9.5Hz, 1 H). 216 A N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-(but-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 461.8 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.59 (s, 1 H),8.89 (d, J = 1.2 Hz, 1 H), 8.46 (d, J = 1.3 Hz, 1 H), 8.22 (d, J = 2.6Hz, 1 H), 7.89 (dd, J = 2.6, 8.6 Hz, 1 H), 7.45 (d, J = 8.6 Hz, 1 H),6.96-6.47 (m, 1 H), 5.83 (s, 2 H), 5.09 (q, J = 2.3 Hz, 2 H), 4.04-3.84(m, 1 H), 1.94-1.76 (m, 4 H), 1.09 (br. s., 1 H), 0.94 (td, J = 6.5, 9.4Hz, 1 H). 217 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-3-methyl- 5-(trifluoromethyl)picolin- amide

MS m/z = 474.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.79 (s, 1 H),8.90 (s, 1 H), 8.30 (s, 1 H), 8.05 (d, J = 2.6 Hz, 1 H), 7.89 (dd, J =2.6, 8.6 Hz, 1 H), 7.47 (d, J = 8.6 Hz, 1 H), 6.98-6.42 (m, 1 H), 5.85(s, 2 H), 3.95 (t, J = 5.5 Hz, 1 H), 2.59 (s, 3 H), 1.94-1.78 (m, 1 H),1.07 (br. s., 1 H), 1.00-0.82 (m, 1 H). 218 B N-(3-((1(R,S),5(S,R),6(R,S))- 3-amino-5- (trifluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropicolinamide compound

MS m/z = 428.9 [M + H]⁺ 1H NMR (300 MHz, CHLOROFORM-d) d = 9.78 (s, 1H), 8.51 (dd, J = 0.6, 2.3 Hz, 1 H), 8.22 (dd, J = 0.7, 8.4 Hz, 1 H),8.09-8.00 (m, 1 H), 7.87 (dd, J = 2.4, 8.4 Hz, 1 H), 7.80-7.74 (m, 1 H),7.11 (dd, J = 8.8, 11.9 Hz, 1 H), 4.70 (br. s., 2 H), 4.02-3.93 (m, 1H), 2.41-2.30 (m, 1 H), 1.50 (t, J = 6.4 Hz, 1 H), 1.10- 0.98 (m, 1 H).219 A N-(3- ((1(S,R),5(R,S),6(S,R))- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 447.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.61 (br. s., 1H), 8.90 (s, 1 H), 8.49 (s, 1 H), 8.23 (br. s., 1 H), 7.89 (d, J = 8.5Hz, 1 H), 7.46 (d, J = 8.2 Hz, 1 H), 6.97-6.43 (m, 1 H), 5.83 (br. s., 2H), 5.14 (br. s., 2 H), 3.97 (br. s., 1 H), 3.64 (br. s., 1 H), 1.87 (d,J = 7.2 Hz, 1 H), 1.24-0.77 (m, 2 H). 220 A N-(3-((1(R,S),5(S,R),6(R,S))- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-4-chloro-1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 465.8 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.66 (s, 1 H),8.77 (s, 1 H), 8.14- 7.66 (m, 3 H), 7.45 (d, J = 8.6 Hz, 1 H), 6.96-6.47(m, 1 H), 5.84 (s, 2 H), 3.96 (br. s., 1 H), 1.93-1.79 (m, 1 H), 1.08(br. s., 1 H), 1.00-0.88 (m, 1 H). 221 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5-(prop-2- yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 447.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.61 (s, 1 H),8.91 (d, J = 1.3 Hz, 1 H), 8.49 (d, J = 1.3 Hz, 1 H), 8.23 (d, J = 2.6Hz, 1 H), 7.89 (dd, J = 2.6, 8.6 Hz, 1 H), 7.46 (d, J = 8.6 Hz, 1 H),6.97-6.48 (m, 1 H), 5.83 (s, 2 H), 5.14 (d, J = 2.3 Hz, 2 H), 4.03-3.93(m, 1 H), 3.64 (t, J = 2.3 Hz, 1 H), 1.88 (td, J = 7.0, 9.6 Hz, 1 H),1.09 (br. s., 1 H), 0.95 (td, J = 6.4, 9.5 Hz, 1 H) 222 AN-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 447.8 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.67 (s, 1 H),8.96 (d, J = 1.3 Hz, 1 H), 8.55 (d, J = 1.3 Hz, 1 H), 8.29 (d, J = 2.6Hz, 1 H), 7.95 (dd, J = 2.6, 8.7 Hz, 1 H), 7.52 (d, J = 8.5 Hz, 1 H),7.02-6.56 (m, 1 H), 5.89 (br. s., 2 H), 5.20 (d, J = 2.3 Hz, 2 H), 4.04(br. s., 1 H), 3.70 (t, J = 2.4 Hz, 1 H), 2.00- 1.87 (m, 1 H), 1.16 (br.s., 1 H), 1.07- 0.95 (m, 1 H). 223 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5-cyano- 3-methylpicolinamide

MS m/z = 431.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) d = 10.82 (s, 1 H),8.98 (d, J = 1.5 Hz, 1 H), 8.40 (d, J = 1.2 Hz, 1 H), 8.05 (d, J = 2.6Hz, 1 H), 7.88 (dd, J = 2.6, 8.6 Hz, 1 H), 7.47 (d, J = 8.6 Hz, 1 H),6.96-6.50 (m, 1 H), 5.85 (s, 2 H), 3.95 (t, J = 5.4 Hz, 1 H), 2.55 (s, 3H), 1.87 (td, J = 6.9, 9.9 Hz, 1 H), 1.08 (br. s., 1 H), 0.94 (td, J =6.3, 9.5 Hz, 1 H). 224 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-4-chloro- 1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 465.8 [M + H]⁺ 1H NMR (300 MHz, METHANOL- d4) d = 8.28 (s, 1H), 7.86 (d, J = 2.6 Hz, 1 H), 7.73 (dd, J = 2.6, 8.6 Hz, 1 H),7.68-7.24 (m, 2 H), 6.95-6.50 (m, 1 H), 3.96-3.85 (m, 1 H), 2.05- 1.91(m, 1 H), 1.18 (t, J = 6.9 Hz, 1 H), 0.90 (td, J = 6.8, 9.3 Hz, 1 H).225 A N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-4-chloro-1-(difluoromethyl)-1H- pyrazole-3-carboxamide

MS m/z = 465.8 [M + H]⁺ 1H NMR (300 MHz, METHANOL- d4) d = 8.40 (s, 1H), 7.98 (d, J = 2.5 Hz, 1 H), 7.84 (dd, J = 2.6, 8.6 Hz, 1 H),7.80-7.36 (m, 2 H), 7.08-6.60 (m, 1 H), 4.08-3.97 (m, 1 H), 2.17- 2.01(m, 1 H), 1.35-1.26 (m, 1 H), 1.01 (td, J = 6.8, 9.4 Hz, 1 H) 226 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 423.8 [M + H]⁺ 1H NMR (400 MHz, DMSO-d6) d = 10.50 (s, 1 H), 882 (s, 1 H), 8 35 (s, 1 H), 8.15 (br. s., 1 H), 7.82 (d, J = 8.6 Hz, 1H), 7.39 (s, 1 H), 6.85-6.46 (m, 1 H), 5.76 (br. s., 2 H), 3.96 (s, 3H), 3.90 (br. s., 1 H), 1.80 (q, J = 7.6 Hz, 1 H), 1.02 (br. s., 1 H),0.87 (q, J = 6.9 Hz, 1 H). 227 B N-(3- ((1(R,S),5(S,R),6(R,S))-3-amino-5- (fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-fluorophenyl)-3-chloro- 5-cyanopicolinamide

MS m/z = 417.8, [M + H]⁺ 1H NMR (MeOH) d: 8.95 (d, J = 1.8 Hz, 1H), 8.54(d, J = 1.8 Hz, 1H), 7.80- 7.91 (m, 1H), 7.76 (dd, J = 7.0, 2.7 Hz, 1H),7.19 (dd, J = 11.9, 8.8 Hz, 1H), 4.77 (d, J = 3.7 Hz, 1H), 4.66 (d, J =2.5 Hz, 1H), 3.99-4.24 (m, 1H), 1.66-1.90 (m, 1H), 1.11-1.25 (m, 1H),0.83-1.02 (m, 1H) 228 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- fluorophenyl)-3-chloro-5-cyanopicolinamide

MS m/z = 418.0, [M + H]⁺ 1H NMR (MeOH) d: 8.94 (d, J = 1.6 Hz, 1H), 8.52(d, J = 1.8 Hz, 1H), 7.83 (dt, J = 8.8, 3.4 Hz, 1H), 7.75 (dd, J = 6.9,2.6 Hz, 1H), 7.18 (dd, J = 11.7, 8.8 Hz, 1H), 4.76 (d, J = 6.7 Hz, 1H),4.64 (d, J = 6.5 Hz, 1H), 4.07 (br. s., 1H), 1.77 (d, J = 9.6 Hz, 1H),1.12- 1.22 (m, 1H), 0.84-1.00 (m, 1H) 229 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-fluorophenyl)-3-chloro- 5-methoxypicolinamide

MS m/z = 422.9 [M + H]⁺ 1H NMR (MeOH) d: 8.32 (d, J = 2.5 Hz, 1H), 7.83(dt, J = 8.7, 3.4 Hz, 1H), 7.73-7.80 (m, 1H), 7.62 (d, J = 2.3 Hz, 1H),7.17 (dd, J = 11.8, 8.9 Hz, 1H), 4.72-4.84 (m, 1H), 4.59-4.71 (m, 1H),4.10 (br. s., 1H), 3.99 (s, 3H), 1.68-1.91 (m, 1H), 1.12-1.27 (m, 1H),0.82-1.05 (m, 1H) 230 B N-(5-((1S,5R,6S)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-6-fluoropyridin- 3-yl)-5-chloropicolinamide

MS m/z = 394.1 [M + H]⁺ 1H NMR (MeOH) d: 8.70-8.75 (m, 1H), 8.63-8.67(m, 1H), 8.42-8.50 (m, 1H), 8.19-8.25 (m, 1H), 8.05- 8.10 (m, 1H),4.70-4.80 (m, 1H), 4.56-4.67 (m, 1H), 4.05-4.19 (m, 1H), 1.67-1.79 (m,1H), 1.10-1.24 (m, 1H), 0.86-1.01 (m, 1H) 231 B N-(5-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-6-fluoropyridin- 3-yl)-5- chloropicolinamide

MS m/z = 394.1 [M + H]⁺ 1H NMR (MeOH) d: 8.74 (d, J = 2.2 Hz, 1H),8.64-8.70 (m, 1H), 8.49 (dd, J = 8.8, 2.5 Hz, 1H), 8.24 (d, J = 8.4 Hz,1H), 8.10 (dd, J = 8.4, 2.3 Hz, 1H), 4.78 (s, 1H), 4.66 (s, 1H), 4.13(br. s., 1H), 1.75 (d, J = 9.6 Hz, 1H), 1.12-1.23 (m, 1H), 0.90-1.04 (m,1H) 232 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(prop-2-yn-1-yloxy)picolinamide

MS m/z = 431[M + H]⁺ 1H NMR (MeOH) d: 8.41 (d, J = 2.7 Hz, 1H), 8.17 (d,J = 8.8 Hz, 1H), 7.86 (dd, J = 6.7, 2.9 Hz, 2H), 7.61 (dd, J = 8.7, 2.8Hz, 1H), 7.16 (dd, J = 11.7, 9.6 Hz, 1H), 5.91-6.54 (m, 1H), 4.94 (s,2H), 3.91-4.16 (m, 1H), 3.08 (t, J = 2.3 Hz, 1H), 1.74-2.00 (m, 1H),1.33 (br. s., 1H), 0.83-1.07 (m, 1H) 233 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(but-2- yn-1-yloxy)picolinamide

MS m/z = 445.1[M + H]⁺ 1H NMR (MeOH) d: 8.38 (d, J = 2.7 Hz, 1H), 8.16(d, J = 8.6 Hz, 1H), 7.86 (dd, J = 6.5, 3.3 Hz, 2H), 7.58 (dd, J = 8.6,2.7 Hz, 1H), 7.16 (dd, J = 11.7, 9.6 Hz, 1H), 6.07-6.49 (m, 1H), 4.86(d, J = 2.3 Hz, 2H), 4.01-4.11 (m, 1H), 1.78-1.98 (m, 4H), 1.33 (br. s.,1H), 0.98 (d, J = 9.4 Hz, 1H) 234 A N-(5-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-6-fluoropyridin- 3-yl)-5-(difluoromethyl)- 3-methylpicolinamide

MS m/z = 424[M + H]⁺ 1H NMR (MeOH) d: 8.69 (s, 1H), 8.63 (s, 1H), 8.41(dd, J = 8.8, 2.5 Hz, 1H), 7.96 (s, 1H), 6.76-7.15 (m, 1H), 4.76 (br.s., 1H), 4.64 (d, J = 2.2 Hz, 1H), 4.11 (t, J = 5.4 Hz, 1H), 2.74 (s,3H), 1.60-1.81 (m, 1H), 1.09-1.22 (m, 1H), 0.84-1.01 (m, 1H) 235 AN-(5-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-6-fluoropyridin- 3-yl)-5-bromopicolinamide

MS m/z = 437.9 [M + H]⁺ 1H NMR (MeOH) d: 8.81 (d, J = 2.0 Hz, 1H), 8.64(s, 1H), 8.46 (dd, J = 8.8, 2.5 Hz, 1H), 8.23 (dd, J = 8.4, 2.2 Hz, 1H),8.07-8.18 (m, 1H), 4.75 (d, J = 1.8 Hz, 1H), 4.63 (d, J = 2.5 Hz, 1H),4.10 (t, J = 5.7 Hz, 1H), 1.61- 1.80 (m, 1H), 1.16 (td, J = 6.8, 2.4 Hz,1H), 0.95 (dt, J = 9.6, 6.7 Hz, 1H) 236 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-(2,2,2- trifluoroethoxy)picolin- amide

MS m/z = 475[M + H]⁺ 1H NMR (MeOH) Shift: 8.49 (d, J = 2.7 Hz, 1H), 8.23(d, J = 8.8 Hz, 1H), 7.85-7.93 (m, 2H), 7.69 (dd, J = 8.7, 2.8 Hz, 1H),7.21 (dd, J = 11.6, 8.7 Hz, 1H), 6.16-6.49 (m, 1H), 4.80 (q, J = 8.2 Hz,2H), 4.12 (t, J = 5.4 Hz, 1H), 1.89-1.99 (m, 1H), 1.38 (t, J = 5.8 Hz,1H), 0.98-1.10 (m, 1H) 237 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- (difluoromethoxy)-3- methylpicolinamide

MS m/z = 457.1 [M + H]⁺ 1H NMR (MeOH) d: 8.40 (d, J = 2.5 Hz, 1H), 7.88(ddd, J = 8.8, 4.3, 2.8 Hz, 1H), 7.82 (dd, J = 6.9, 2.6 Hz, 1H), 7.61(s, 1H), 7.18-7.27 (m, 1H), 6.86-7.17 (m, 1H), 6.11-6.48 (m, 1H),3.99-4.17 (m, 1H), 2.73 (s, 3H), 1.83-2.01 (m, 1H), 1.36 (br. s., 1H),0.91-1.09 (m, 1H) 238 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- (difluoromethoxy) pyrazine-2-carboxamide

MS m/z = 444[M + H]⁺ 1H NMR (MeOH) d: 8.97 (s, 1H), 8.49 (s, 1H),7.80-7.93 (m, 2H), 7.41- 7.70 (m, 1H), 7.17 (t, J = 10.1 Hz, 1H),6.07-6.44 (m, 1H), 3.93-4.12 (m, 1H), 1.88 (q, J = 7.9 Hz, 1H), 1.32(br. s., 1H), 0.97 (q, J = 7.7 Hz, 1H) 239 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)cyclo- hexanecarboxamide

MS m/z = 382.1[M + H]⁺ 1H NMR (MeOH) ?: 7.66 (br. s., 1H), 7.58 (d, J =6.8 Hz, 1H), 7.07 (t, J = 10.0 Hz, 1H), 6.06-6.41 (m, 1H), 4.01 (br. s.,1H), 2.35 (t, J = 11.4 Hz, 1H), 1.78-1.91 (m, 5H), 1.72 (d, J = 11.2 Hz,1H), 1.44-1.58 (m, 2H), 1.20-1.41 (m, 4H), 0.90-1.01 (m, 1H) 240N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2- methoxyacetamide

MS m/z = 344.1 [M + H]⁺ 1H NMR (MeOH) ?: 7.29-7.74 (m, 2H), 7.11 (t, J =10.2 Hz, 1H), 6.07- 6.41 (m, 1H), 4.02 (s, 3H), 3.47 (s, 3H), 1.84 (q, J= 7.5 Hz, 1H), 1.30 (br. s., 1H), 0.88-1.01 (m, 1H) 241 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2-cyclohexylacetamide

MS m/z = 396.1[M + H]⁺ 1H NMR (MeOH) ?: 7.67 (br. s., 1H), 7.57 (d, J =6.8 Hz, 1H), 7.08 (t, J = 10.6 Hz, 1H), 6.06-6.41 (m, 1H), 4.01 (br. s.,1H), 2.22 (d, J = 7.2 Hz, 2H), 1.64-1.88 (m, 7H), 1.13-1.40 (m, 4H),0.89-1.11 (m, 3H) 242 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)tetrahydro- 2H-pyran-4-carboxamide

MS m/z = 384.1[M + H]⁺ 1H NMR (MeOH) ?: 7.31-7.71 (m, 2H), 7.02-7.21 (m,1H), 6.06-6.41 (m, 1H), 4.00 (d, J = 8.6 Hz, 3H), 3.48 (t, J = 11.7 Hz,2H), 2.62 (t, J = 11.6 Hz, 1H), 1.68-1.93 (m, 5H), 1.29 (br. s., 1H),0.86-1.01 (m, 1H) 243 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)cyclohex- 1-enecarboxamide

MS m/z = 380.1[M + H]⁺ 1H NMR (MeOH) ?: 7.63-7.72 (m, 2H), 7.12 (dd, J =11.8, 8.7 Hz, 1H), 6.70 (dt, J = 3.7, 2.1 Hz, 1H), 6.11-6.45 (m, 1H),3.99-4.09 (m, 1H), 2.32-2.40 (m, 2H), 2.27 (dd, J = 6.2, 2.6 Hz, 2H),1.82-1.93 (m, 1H), 1.65-1.79 (m, 4H), 1.33 (d, J = 4.5 Hz, 1H), 0.99(dt, J = 9.4, 6.7 Hz, 1H) 244 A (S,R)-N-(3-((1R,5S,6R)- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)tetrahydro- furan-2-carboxamide

MS m/z = 370.1[M + H]⁺ 1H NMR (MeOH) ?: 7.67-7.76 (m, 2H), 7.14 (dd, J =11.7, 8.8 Hz, 1H), 6.08-6.45 (m, 1H), 4.44 (dd, J = 7.8, 6.3 Hz, 1H),4.08-4.15 (m, 1H), 4.02-4.07 (m, 1H), 3.92-3.98 (m, 1H), 2.36 (dq, J =12.4, 7.5 Hz, 1H), 2.10 (dq, J = 13.1, 6.6 Hz, 1H), 1.94-2.03 (m, 2H),1.83-1.91 (m, 1H), 1.33 (t, J = 6.0 Hz, 1H), 0.99 (dt, J = 9.4, 6.7 Hz,1H) 245 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-1-(4-chlorophenyl)cyclo- propanecarboxamide

MS m/z = 450[M + H]⁺ 1H NMR (MeOH) ?: 7.46-7.52 (m, 4H), 7.38-7.45 (m,2H), 7.04-7.13 (m, 1H), 6.05-6.39 (m, 1H), 3.97-4.05 (m, 1H), 1.84 (dt,J = 9.4, 6.9 Hz, 1H), 1.60 (q, J = 3.7 Hz, 2H), 1.30 (t, J = 6.5 Hz,1H), 1.20 (q, J = 3.7 Hz, 2H), 0.96 (dt, J = 9.4, 6.7 Hz, 1H) 246 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-1-(4-chlorophenyl)cyclo- butanecarboxamide

MS m/z = 464.1[M + H]⁺ 1H NMR (MeOH) ?: 7.53-7.62 (m, 2H), 7.43-7.49 (m,2H), 7.33-7.39 (m, 2H), 7.07 (dd, J = 11.7, 8.8 Hz, 1H), 6.03-6.39 (m,1H), 3.93-4.04 (m, 1H), 2.82-2.94 (m, 2H), 2.54 (d, J = 7.2 Hz, 2H),1.86-2.03 (m, 2H), 1.75-1.86 (m, 1H), 1.23-1.34 (m, 1H), 0.89-1.01 (m,1H) 247 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-methoxypropanamide

MS m/z = 358.1[M + H]⁺ 1H NMR (MeOH) ?: 7.31-7.76 (m, 2H), 7.04-7.22 (m,1H), 6.01-6.44 (m, 1H), 3.92-4.07 (m, 1H), 3.72 (t, J = 6.1 Hz, 2H),3.36 (s, 3H), 2.61 (t, J = 6.2 Hz, 2H), 1.75-1.90 (m, 1H), 1.31 (br. s.,1H), 0.96 (dt, J = 9.5, 6.7 Hz, 1H) 248 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-1-methyl- 6-oxo-1,6- dihydropyridine-3- carboxamide

MS m/z = 407 [M + H]⁺ 1H NMR (MeOH) ?: 8.46 (d, J = 2.5 Hz, 1H), 8.06(dd, J = 9.4, 2.7 Hz, 1H), 7.78 (ddd, J = 8.8, 4.2, 2.8 Hz, 1H), 7.71(dd, J = 6.8, 2.7 Hz, 1H), 7.17 (dd, J = 11.7, 8.8 Hz, 1H), 6.61 (d, J =9.4 Hz, 1H), 6.09-6.45 (m, 1H), 3.98-4.11 (m, 1H), 3.67 (s, 3H),1.80-1.93 (m, 1H), 1.34 (t, J = 6.6 Hz, 1H), 1.00 (dt, J = 9.6, 6.7 Hz,1H) 249 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-1-methyl-2-oxo-1,2- dihydropyridine-4- carboxamide

MS m/z = 407 [M + H]⁺ 1H NMR (MeOH) ?: 7.80 (d, J = 6.3 Hz, 3H), 7.20(dd, J = 11.7, 9.0 Hz, 1H), 7.03 (s, 1H), 6.78 (dd, J = 6.9, 1.9 Hz,1H), 6.07-6.50 (m, 1H), 4.09 (br. s., 1H), 3.64 (s, 3H), 1.79-1.97 (m,1H), 1.36 (br. s., 1H), 0.95-1.09 (m, 1H) 250 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5-((3- cyclopropylprop-2-yn-1- yl)oxy)picolinamide

MS m/z = 471.1 [M + H]⁺ 1H NMR (MeOH) ?: 8.37 (br. s., 1H), 8.15 (d, J =8.6 Hz, 1H), 7.85 (d, J = 5.9 Hz, 2H), 7.56 (d, J = 8.4 Hz, 1H), 7.16(t, J = 10.5 Hz, 1H), 6.06-6.43 (m, 1H), 4.85 (s, 2H), 4.05 (br. s.,1H), 1.83- 1.95 (m, 1H), 1.19-1.40 (m, 3H), 0.97 (d, J = 7.8 Hz, 1H),0.79 (d, J = 7.2 Hz, 2H), 0.62 (br. s., 2H) 251 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3,3,3- trifluoropropanamide

MS m/z = 382 [M + H]⁺ 1H NMR (MeOH) ?: 7.70 (d, J = 8.4 Hz, 1H), 7.60(d, J = 6.5 Hz, 1H), 7.12 (t, J = 10.3 Hz, 1H), 6.05-6.43 (m, 1H), 4.03(br. s., 1H), 3.34 (s, 2H), 1.84 (q, J = 7.5 Hz, 1H), 1.30 (br. s., 1H),0.96 (q, J = 7.5 Hz, 1H) 252 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-2-(4- chlorophenyl) propanamide

MS m/z = 438 [M + H]⁺ 1H NMR (MeOH) ?: 7.66 (br. s., 1H), 7.56 (t, J =7.7 Hz, 1H), 7.35-7.41 (m, 2H), 7.28-7.35 (m, 2H), 7.07 (t, J = 10.4 Hz,1H), 6.03-6.40 (m, 1H), 3.99 (br. s., 1H), 3.80 (q, J = 7.1 Hz, 1H),1.81 (d, J = 7.2 Hz, 1H), 1.49 (d, J = 6.8 Hz, 3H), 1.17-1.34 (m, 1H),0.88-1.01 (m, 1H) 253 A (R,S)-N-(3-((1R,5S,6R)- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)tetrahydro- furan-3-carboxamide

MS m/z = 370.1 [M + H]⁺ 1H NMR (MeOH) ?: 7.66-7.97 (m, 1H), 7.43-7.62(m, 1H), 7.09 (t, J = 10.5 Hz, 1H), 6.00-6.44 (m, 1H), 3.75-4.05 (m,4H), 3.34 (s, 1H), 3.17 (quin, J = 7.3 Hz, 1H), 2.14-2.25 (m, 2H), 1.83(q, J = 7.4 Hz, 1H), 1.29 (br. s., 1H), 0.86-1.01 (m, 1H) 254 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2-(tert-butoxy)acetamide

MS m/z = 386.1 [M + H]⁺ 1H NMR (MeOH) ?: 7.65 (d, J = 6.3 Hz, 2H), 7.11(t, J = 10.3 Hz, 1H), 6.01-6.42 (m, 1H), 3.85-4.14 (m, 3H), 1.85 (q, J =7.5 Hz, 1H), 1.29 (s, 9H), 1.17-1.28 (m, 1H), 0.95 (q, J = 7.6 Hz, 1H)255 A N-(3-((1R,5S,6R)-3- amino 5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2-(2-methoxyethoxy) acetamide

MS m/z = 388.1 [M + H]⁺ 1H NMR (MeOH) ?: 7.69 (d, J = 5.9 Hz, 2H), 7.12(t, J = 10.1 Hz, 1H), 6.03-6.42 (m, 1H), 4.11 (s, 2H), 4.02 (br. s.,1H), 3.75 (d, J = 2.2 Hz, 2H), 3.63 (br. s., 2H), 3.43 (s, 3H), 1.78-1.88 (m, 1H), 1.30 (br. s., 1H), 0.91- 1.00 (m, 1H) 256 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2- phenoxyacetamide

MS m/z = 406.1 [M + H]⁺ 1H NMR (MeOH) ?: 7.67-7.74 (m, 2H), 7.31 (t, J =7.7 Hz, 2H), 7.13 (t, J = 10.3 Hz, 1H), 6.95-7.07 (m, 3H), 6.11-6.44 (m,1H), 4.65 (s, 2H), 4.05 (br. s., 1H), 1.87 (q, J = 7.6 Hz, 1H), 1.32 (m,1H), 1.28-1.37 (m, 1H), 0.98 (q, J = 7.4 Hz, 1H) 257 A(R,S)-N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-2-methoxypropanamide

MS m/z = 358 [M + H]⁺ 1H NMR (MeOH) ?: 7.70 (d, J = 6.8 Hz, 2H), 7.12(t, J = 10.4 Hz, 1H), 6.00-6.45 (m, 1H), 4.04 (br. s., 1H), 3.87 (q, J =6.8 Hz, 1H), 3.42 (s, 3H), 1.86 (q, J = 7.5 Hz, 1H), 1.40 (d, J = 6.8Hz, 3H), 1.32 (br. s., 1H), 0.91-1.02 (m, 1H) 258 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3- oxocyclobutanecarbox- amide

MS m/z = 368 [M + H]⁺ 1H NMR (MeOH) ?: 7.54-7.85 (m, 2H), 7.12 (t, J =10.2 Hz, 1H), 5.91- 6.46 (m, 1H), 4.05 (br. s., 1H), 3.35 (d, J = 5.7Hz, 3H), 1.76-1.95 (m, 1H), 1.32 (br. s., 1H), 0.75-1.08 (m, 1H) 259 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-((R,S))- 1-cyanoethoxy) picolinamide

MS m/z = 446.1 [M + H]⁺ 1H NMR (MeOH) ?: 8.51 (d, J = 2.7 Hz, 1H), 8.26(d, J = 8.8 Hz, 1H), 7.87- 7.93 (m, 2H), 7.74 (dd, J = 8.7, 2.8 Hz, 1H),7.20 (dd, J = 11.7, 9.2 Hz, 1H), 6.11-6.48 (m, 1H), 5.49 (q, J = 6.7 Hz,1H), 4.07-4.12 (m, 1H), 1.88-1.96 (m, 1H), 1.85 (d, J = 6.7 Hz, 3H),1.34-1.40 (m, 1H), 1.01 (dt, J = 9.5, 6.8 Hz, 1H) 260 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)cyclo-propanecarboxamide

MS m/z = 340 [M + H]⁺ 1H NMR (MeOH) ?: 7.67 (dd, J = 5.2, 3.6 Hz, 1H),7.59 (dd, J = 6.9, 2.6 Hz, 1H), 7.09 (dd, J = 11.7, 8.8 Hz, 1H),6.06-6.42 (m, 1H), 3.98-4.07 (m, 1H), 1.81-1.90 (m, 1H), 1.72-1.79 (m,1H), 1.31 (t, J = 5.8 Hz, 1H), 0.92-1.00 (m, 3H), 0.86 (dt, J = 7.8, 3.1Hz, 2H) 261 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloropyrazine-2- carboxamide

MS m/z = 412.0 [M + H]⁺ ¹H NMR (MeOH): 9.16 (d, J = 1.2 Hz, 1H), 8.80(d, J = 1.4 Hz, 1H), 7.81- 8.02 (m, 2H), 7.21 (dd, J = 11.8, 9.3 Hz,1H), 6.00-6.54 (m, 1H), 4.08 (br. s., 1H), 1.91 (d, J = 9.4 Hz, 1H),1.36 (br. s., 1H), 0.93-1.08 (m, 1H) 262 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3- phenylpropiolamide

MS m/z = 400.1 [M + H]⁺ 1H NMR (MeOH) ?: 7.71-7.80 (m, 2H), 7.63-7.69(m, 2H), 7.45-7.56 (m, 3H), 7.17 (dd, J = 11.7, 8.8 Hz, 1H), 6.13-6.47(m, 1H), 4.04-4.10 (m, 1H), 1.85-1.92 (m, 1H), 1.33-1.37 (m, 1H),0.97-1.05 (m, 1H) 263 C N-(3- ([(1R,S),(5S,R),(6R,S)]- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)phenyl)-5-chloropicolinamide

MS m/z = 392.9 [M + H]⁺. ¹H NMR (400 MHz, CHLOROFORM-d) d ppm 9.83-9.88(m, 1 H) 8.55 (s, 1 H) 8.22-8.27 (m, 1 H) 7.85-7.93 (m, 2 H) 7.81 (d, J= 7.43 Hz, 1 H) 7.80 (br. s., 1 H) 7.35-7.44 (m, 2 H) 5.78 (s, 1 H)3.94- 4.01 (m, 1 H) 1.72-1.81 (m, 1 H) 1.38-1.43 (m, 1 H) 0.94-1.02 (m,1 H) 264 C N-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)phenyl)-5- chloropicolinamide

MS m/z = 392.9 [M + H]⁺. ¹H NMR (400 MHz, CHLOROFORM-d) d ppm 9.84 (br.s., 1 H) 8.50-8.56 (m, 1 H) 8.22 (br. s., 1 H) 7.77-7.95 (m, 4 H)7.34-7.43 (m, 3 H) 5.78 (br. s., 1 H) 3.94-4.02 (m, 2 H) 1.74-1.81 (m, 1H) 1.42 (t, J = 7.63 Hz, 1 H) 0.94-1.01 (m, 1 H) 265 CN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)phenyl)-5- chloropicolinamide

MS m/z = 392.9 [M + H]⁺. ¹H NMR (400 MHz, CHLOROFORM-d) d ppm 9.76 (br.s., 1 H) 8.41-8.50 (m, 1 H) 8.15 (d, J = 8.41 Hz, 1 H) 7.82-7.87 (m, 1H) 7.75-7.82 (m, 1 H) 7.66- 7.75 (m, 1 H) 7.26-7.35 (m, 2 H) 5.68-5.73(m, 1 H) 3.85-3.93 (m, 1 H) 1.65-1.74 (m, 1 H) 1.29-1.36 (m, 1 H)0.85-0.95 (m, 1 H) 266 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- methylpyrazine-2- carboxamide

MS m/z = 392 [M + H]⁺. ¹H NMR (400 MHz, CHLOROFORM-d) d ppm 9.59-9.63(m, 1 H) 9.33-9.36 (m, 1 H) 8.42 (s, 1 H) 7.97 (br. s., 1 H) 7.67 (br.s., 1 H) 7.08-7.15 (m, 1 H) 6.24 (s, 1 H) 3.99 (t, J = 7.92 Hz, 1 H)2.66- 2.71 (m, 3 H) 1.86-1.94 (m, 1 H) 1.44 (t, J = 7.73 Hz, 1 H)0.97-1.04 (m, 1 H) 267 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- bromopyrimidine-2- carboxamide

MS m/z = 456.9 [M + H]⁺. ¹H NMR (400 MHz, CHLOROFORM-d) d ppm 9.64-9.71(m, 1 H) 8.94-8.96 (m, 1 H) 8.94 (s, 1 H) 7.94-8.01 (m, 1 H) 7.69-7.74(m, 1 H) 7.06-7.13 (m, 1 H) 6.24 (s, 1 H) 3.91-3.96 (m, 1 H) 1.83-1.91(m, 1 H) 1.40-1.46 (m, 1 H) 0.93-1.01 (m, 1 H) 268 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- (trifluoromethyl) pyrazine-2-carboxamide

MS m/z = 446 [M + H]⁺. ¹H NMR (400 MHz, CHLOROFORM-d) d ppm 9.55-9.59(m, 2 H) 8.93 (s, 1 H) 7.98 (br. s., 1 H) 7.69 (d, J = 7.24 Hz, 1 H)7.08-7.13 (m, 1 H) 6.22-6.25 (m, 1 H) 4.00 (t, J = 8.02 Hz, 1 H) 1.91(br. s., 1 H) 1.45 (t, J = 8.22 Hz, 1 H) 1.02 (br. s., 1 H) 269 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- methylphenyl)-5-cyanopicolinamide

MS m/z = 398 [M + H]⁺. ¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 9.83 (br.s., 1 H) 8.88 (s, 1 H) 8.42 (d, J = 8.04 Hz, 1 H) 8.19 (d, J = 8.04 Hz,1 H) 8.08 (s, 1 H) 7.70 (d, J = 7.89 Hz, 1 H) 7.18-7.24 (m, 1 H) 6.19(t, J = 56.20 Hz, 1 H) 4.06 (br. s., 1 H) 2.59 (s, 3 H) 1.87 (d, J =8.48 Hz, 1 H) 1.47 (br. s., 1 H) 1.01 (d, J = 8.62 Hz, 1 H) 270 CN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5- chloropicolinamide

MS m/z = 409.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.68-1.14 (m, 2H) 1.52-1.83 (m, 1 H) 3.76-4.14 (m, 1 H) 4.46- 5.02 (m, 2 H) 5.44-5.70(m, 2 H) 7.14-7.55 (m, 1 H) 7.79-7.99 (m, 1 H) 8.17 (s, 3 H) 8.65-9.03(m, 1 H) 10.53-10.96 (m, 1 H) 271 C N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- chloropicolinamide

MS m/z = 409.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.74-1.07 (m, 2H) 1.52-1.84 (m, 1 H) 3.97 (br. s., 1 H) 4.46-4.98 (m, 2 H) 7.42 (d, J =8.62 Hz, 1 H) 7.88 (dd, J = 8.55, 2.27 Hz, 1 H) 8.04-8.30 (m, 3 H) 8.79(d, J = 1.75 Hz, 1 H) 10.70 (s, 1 H) 272 C N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- methoxypyrazine-2- carboxamide

MS m/z = 406.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.68-1.04 (m, 2H) 1.58-1.78 (m, 1 H) 3.97 (br. s., 1 H) 4.03 (s, 3 H) 4.51-4.94 (m, 2H) 5.59 (s, 2 H) 7.41 (d, J = 8.62 Hz, 1 H) 7.86 (dd, J = 8.62, 2.63 Hz,1 H) 8.16 (d, J = 2.63 Hz, 1 H) 8.42 (d, J = 1.17 Hz, 1 H) 8.89 (d, J =1.32 Hz, 1 H) 10.53 (s, 1 H) 273 C N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- methoxypyrazine-2- carboxamide

MS m/z = 406.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.78-1.01 (m, 2H) 1.67 (dt, J = 9.76, 6.96 Hz, 1 H) 3.93-4.00 (m, 1 H) 4.02 (s, 3 H)4.54-4.95 (m, 2 H) 5.59 (s, 2 H) 7.41 (d, J = 8.62 Hz, 1 H) 7.86 (dd, J= 8.62, 2.63 Hz, 1 H) 8.16 (d, J = 2.63 Hz, 1 H) 8.42 (d, J = 1.32 Hz, 1H) 8.89 (d, J = 1.32 Hz, 1 H) 10.53 (s, 1 H) 274 C N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- bromopicolinamide

MS m/z = 452.9 [M]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.81-0.99 (m, 2 H)1.67 (dt, J = 9.57, 7.05 Hz, 1 H) 3.97 (br. s., 1 H) 4.57-4.89 (m, 2 H)5.59 (s, 2 H) 7.42 (d, J = 8.62 Hz, 1 H) 7.88 (dd, J = 8.62, 2.63 Hz, 1H) 8.08 (d, J = 8.33 Hz, 1 H) 8.16 (d, J = 2.48 Hz, 1 H) 8.33 (dd, J =8.40, 2.27 Hz, 1 H) 8.87 (d, J = 2.19 Hz, 1 H) 10.70 (s, 1 H) 275 CN-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5- bromopicolinamide

MS m/z = 452.9 [M]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.81-1.00 (m, 2 H)1.67 (dt, J = 9.65, 7.02 Hz, 1 H) 3.96 (br. s., 1 H) 4.56-4.89 (m, 2 H)5.60 (s, 2 H) 7.42 (d, J = 8.62 Hz, 1 H) 7.88 (dd, J = 8.62, 2.48 Hz, 1H) 8.08 (d, J = 8.33 Hz, 1 H) 8.16 (d, J = 2.48 Hz, 1 H) 8.33 (dd, J =8.33, 2.19 Hz, 1 H) 8.87 (d, J = 2.19 Hz, 1 H) 10.70 (s, 1 H) 276 CN-(3-(((1R,S), (5S,R), (6R,S))-3-amino-5- (fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5- chloropicolinamide

MS m/z = 409.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.78-1.05 (m, 2H) 1.43-1.61 (m, 1 H) 1.62-1.83 (m, 1 H) 3.97 (br. s., 1 H) 4.46-4.99(m, 2 H) 5.60 (br. s., 2 H) 7.42 (d, J = 8.62 Hz, 1 H) 7.88 (d, J = 7.60Hz, 1 H) 8.08-8.34 (m, 3 H) 8.79 (s, 1 H) 10.69 (br. s., 1 H) 277 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5- cyanopicolinamide

MS m/z = 400.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.95 (br. s., 2H) 1.73 (br. s., 1 H) 4.11 (br. s., 1 H) 4.62-5.04 (m, 2 H) 7.49 (d, J =8.48 Hz, 1 H) 7.94 (d, J = 9.21 Hz, 1 H) 8.21 (d, J = 2.19 Hz, 1 H)8.26-8.32 (m, 1 H) 8.59 (dd, J = 8.11, 1.97 Hz, 1 H) 9.21 (d, J = 1.17Hz, 1 H) 10.95 (br. s., 1 H) 278 B N-(3-((1S,5R,6S)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- cyanopicolinamide

MS m/z = 400.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.71-1.13 (m, 2H) 1.53-1.83 (m, 1 H) 4.00 (br. s., 1 H) 4.53-4.95 (m, 13 H) 5.39-5.90(m, 2 H) 7.45 (d, J = 8.62 Hz, 1 H) 7.90 (dd, J = 8.62, 2.63 Hz, 1 H)8.11-8.38 (m, 2 H) 8.58 (dd, J = 8.18, 2.05 Hz, 1 H) 9.21 (d, J = 1.17Hz, 1 H) 10.88 (s, 7 H) 279 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5-(prop-2- yn-1-yloxy)pyrazine-2- carboxamide

MS m/zm/z = 430.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.93 (br. s.,2 H) 1.71 (br. s., 1 H) 3.64 (t, J = 2.41 Hz, 1 H) 3.92-4.23 (m, 1 H)4.58-4.96 (m, 2 H) 5.14 (d, J = 2.34 Hz, 2 H) 5.75 (s, 1 H) 7.45 (d, J =8.48 Hz, 1 H) 7.89 (d, J = 7.45 Hz, 1 H) 8.18 (d, J = 2.34 Hz, 1 H) 8.49(d, J = 1.32 Hz, 1 H) 8.91 (d, J = 1.32 Hz, 1 H) 10.61 (br. s., 1 H) 280B N-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 430.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.77-1.04 (m, 2H) 1.55-1.78 (m, 1 H) 3.64 (t, J = 2.34 Hz, 1 H) 3.98 (br. s., 1 H)4.55-4.89 (m, 2 H) 5.14 (d, J = 2.48 Hz, 2 H) 5.60 (br. s., 2 H) 7.42(d, J = 8.62 Hz, 1 H) 7.86 (dd, J = 8.62, 2.48 Hz, 1 H) 8.17 (d, J =2.48 Hz, 1 H) 8.49 (d, J = 1.32 Hz, 1 H) 8.90 (d, J = 1.17 Hz, 1 H)10.57 (s, 6 H) 281 B N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-3,5-dichloropicolinamide

MS m/z = 443.0 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.71-1.07 (m, 2H) 1.58-1.81 (m, 1 H) 3.94 (br. s., 1 H) 4.56-4.72 (m, 1 H) 4.74-4.89(m, 1 H) 5.62 (br. s., 2 H) 7.44 (d, J = 8.62 Hz, 1 H) 7.81 (dd, J =8.55, 2.56 Hz, 1 H) 7.92 (d, J = 2.48 Hz, 1 H) 8.44 (d, J = 2.05 Hz, 1H) 8.73 (d, J = 2.05 Hz, 1 H) 10.83 (s, 1 H) 282 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5- methoxypicolinamide

MS m/z = 405.0 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.80-1.01 (m, 2H) 1.68 (dt, J = 9.76, 6.96 Hz, 1 H) 3.88-4.04 (m, 4 H) 4.51-4.92 (m, 2H) 5.61 (br. s., 2 H) 7.41 (d, J = 8.62 Hz, 1 H) 7.62 (dd, J = 8.77,2.92 Hz, 1 H) 7.90 (dd, J = 8.62, 2.63 Hz, 1 H) 8.07-8.23 (m, 2 H) 8.40(d, J = 2.78 Hz, 1 H) 10.48 (s, 1 H) 283 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5-cyano- 3-methylpicolinamide

MS m/z = 414.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.76-1.02 (m, 2H) 1.57-1.77 (m, 1 H) 2.55 (s, 3 H) 3.95 (br. s., 1 H) 4.51-4.92 (m, 2H) 5.60 (br. s., 2 H) 7.43 (d, J = 8.62 Hz, 1 H) 7.84 (dd, J = 8.62,2.48 Hz, 1 H) 8.01 (d, J = 2.34 Hz, 1 H) 8.39 (d, J = 1.17 Hz, 1 H) 8.98(d, J = 1.46 Hz, 1 H) 10.77 (s, 1 H) 284 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-3-chloro- 5-methoxypicolinamide

MS m/z = 439.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.79-0.98 (m, 2H) 1.60-1.73 (m, 1 H) 3.93 (s, 4 H) 4.64 (s, 1 H) 4.80 (s, 1 H) 5.59(br. s., 2 H) 7.41 (d, J = 8.62 Hz, 1 H) 7.73 (d, J = 2.48 Hz, 1 H) 7.82(dd, J = 8.55, 2.56 Hz, 1 H) 7.97 (d, J = 2.48 Hz, 1 H) 8.35 (d, J =2.48 Hz, 1 H) 10.62 (s, 1 H) 285 B N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5-(but-2- yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 444 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.70-1.07 (m, 2 H)1.57-1.75 (m, 1 H) 1.85 (t, J = 2.27 Hz, 3 H) 4.00 (d, J = 14.76 Hz, 1H) 4.51-4.90 (m, 2 H) 5.09 (d, J = 2.34 Hz, 2 H) 5.60 (br. s., 2 H) 7.42(d, J = 8.62 Hz, 1 H) 7.86 (dd, J = 8.70, 2.56 Hz, 1 H) 8.16 (d, J =2.48 Hz, 1 H) 8.46 (d, J = 1.17 Hz, 1 H) 8.89 (d, J = 1.17 Hz, 1 H)10.55 (s, 1 H) 286 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-6- chloropicolinamide

MS m/z = 411.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.83-1.00 (m, 1H) 1.15 (br. s., 1 H) 1.68-1.84 (m, 1 H) 3.90-4.10 (m, 1 H) 5.86 (s, 2H) 5.96-6.46 (m, 1 H) 7.22 (dd, J = 11.84, 8.92 Hz, 1 H) 7.74-7.89 (m, 2H) 7.98 (dd, J = 7.09, 2.70 Hz, 1 H) 8.06-8.15 (m, 2 H) 10.50 (s, 1 H)287 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-4-chloropicolinamide

MS m/z = 411.1 [M + H]⁺. ¹H NMR (400 MHz, DMSO-d₆) ppm 0.74-1.04 (m, 1H) 1.15 (br. s., 1 H) 1.58-1.86 (m, 1 H) 4.03 (br. s., 1 H) 5.85 (br.s., 2 H) 6.00-6.42 (m, 1 H) 7.22 (dd, J = 11.84, 8.90 Hz, 1 H) 7.79-7.95(m, 2 H) 8.04 (dd, J = 7.04, 2.74 Hz, 1 H) 8.15 (d, J = 1.96 Hz, 1 H)8.72 (d, J = 5.28 Hz, 1 H) 10.73 (s, 1 H) 288 B N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3- isopropylpicolinamide

MS m/z = 419.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.85-0.98 (m, 1H) 1.07 (s, 1 H) 1.10-1.20 (m, 2 H) 1.23 (dd, J = 6.87, 0.88 Hz, 5 H)1.64-1.78 (m, 1 H) 1.99 (s, 1 H) 3.57 (quin, J = 6.87 Hz, 1 H) 3.89-4.09(m, 2 H) 5.86 (br. s., 2 H) 5.98-6.46 (m, 1 H) 7.12-7.29 (m, 1 H) 7.53(dd, J = 8.04, 4.68 Hz, 1 H) 7.82-7.89 (m, 2 H) 7.95 (dd, J = 7.97, 1.39Hz, 1 H) 8.49 (dd, J = 4.68, 1.46 Hz, 1 H) 10.59 (s, 1 H) 289 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloro-3-isopropylpicolinamide

MS m/z = 453.2 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) ppm 0.79-1.01 (m, 1H) 1.09-1.18 (m, 2 H) 1.24 (d, J = 6.87 Hz, 6 H) 1.62-1.82 (m, 1 H) 3.51(quin, J = 6.87 Hz, 1 H) 3.85-4.13 (m, 2 H) 5.87 (s, 2 H) 5.99-6.43 (m,1 H) 7.21 (dd, J = 11.62, 8.55 Hz, 1 H) 7.73-7.92 (m, 2 H) 8.09 (d, J =2.19 Hz, 1 H) 8.54 (d, J = 2.19 Hz, 1 H) 10.63 (s, 1 H) 290 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-bromo- 3-(difluoromethyl)picolin- amide

MS m/z = 505 [M + H]⁺. ¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.81-1.02 (m, 1H) 1.08-1.22 (m, 2 H) 1.14 (br. s., 1 H) 1.66-1.79 (m, 1 H) 3.94-4.10(m, 1 H) 5.82- 5.89 (m, 2 H) 5.86 (br. s., 2 H) 6.00- 6.41 (m, 1 H)7.16-7.29 (m, 1 H) 7.53-7.98 (m, 3 H) 8.51 (s, 1 H) 9.02 (s, 1 H) 10.85(s, 1 H) 291 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-phenylpicolinamide

MS m/z = 453.2 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.77-1.05 (m, 1H) 1.10-1.34 (m, 1 H) 1.60-1.86 (m, 1 H) 3.92- 4.12 (m, 1 H) 5.87 (s, 2H) 5.98-6.44 (m, 1 H) 7.10-7.35 (m, 1 H) 7.41- 7.72 (m, 3 H) 7.84 (d, J= 7.60 Hz, 2 H) 7.89-7.97 (m, 1 H) 8.02-8.12 (m, 1 H) 8.24 (s, 1 H) 8.34(s, 1 H) 8.89- 9.15 (m, 1 H) 10.56-10.83 (m, 1 H) 292 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl) picolinamide

MS m/z = 377.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.86-0.99 (m, 1H) 1.09-1.23 (m, 1 H) 1.65-1.81 (m, 1 H) 3.17 (d, J = 5.12 Hz, 2 H)3.97-4.13 (m, 1H + 1 H) 5.86 (s, 2 H) 5.98-6.43 (m, 1 H) 7.14-7.31 (m, 1H) 7.61-7.75 (m, 1 H) 7.84-7.95 (m, 1 H) 8.00-8.20 (m, 3 H) 8.62-8.84(m, 1 H) 10.57- 10.77 (m, 1 H) (traces of methanol) 293 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-3-methylpicolinamide

MS m/z = 391.1 [M + H]⁺. ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.76-1.01 (m, 1H) 1.06-1.25 (m, 1 H) 1.59-1.83 (m, 1 H) 2.56 (s, 3 H) 3.86-4.10 (m, 1H) 5.85 (s, 2 H) 5.96-6.45 (m, 1 H) 7.08-7.30 (m, 1 H) 7.46-7.58 (m, 1H) 7.88 (br. s., 3 H) 8.41-8.63 (m, 1 H) 10.57 (s, 1 H) 294 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- methylphenyl)-5-methoxypyrazine-2- carboxamide

MS m/z = 404.0 [M + H]⁺ ¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 9.51 (br.s., 1 H) 9.01 (s, 1 H) 8.15 (s, 1 H) 8.08 (s, 1 H) 7.64 (s, 1 H) 7.19(d, J = 8.41 Hz, 1 H) 6.00-6.41 (m, 1 H) 4.04- 4.13 (m, 4 H) 2.58 (s, 3H) 1.65-1.78 (m, 1 H) 1.45-1.55 (m, 1 H) 0.99- 1.06 (m, 1 H) 295 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- methylphenyl)-5-chloropicolinamide

MS m/z = 407.0 [M + H]⁺ ¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 9.81 (br.s., 1 H) 8.55 (s, 1 H) 8.24 (d, J = 8.22 Hz, 1 H) 8.08 (s, 1 H)7.83-7.92 (m, 1 H) 7.68 (d, J = 7.82 Hz, 1 H) 7.20 (d, J = 8.22 Hz, 1 H)6.20 (t, J = 56.24 Hz, 1 H) 4.07 (br. s., 1 H) 2.59 (s, 3 H) 1.73-1.98(m, 1 H) 1.48 (t, J = 5.87 Hz, 1 H) 0.83-1.08 (m, 1 H) 296 AN-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-bromopicolinamide

MS m/z = 455.0 [M + H]⁺ ¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.95 (dd, J= 16.04, 6.85 Hz, 1 H) 1.42 (br. s., 1 H) 1.86 (dd, J = 15.85, 8.61 Hz,1 H) 3.89-3.95 (m, 1 H) 4.63 (br. s., 2 H) 6.23 (t, J = 55.90 Hz, 1 H)7.06 (t, J = 10.20 Hz, 1 H) 7.63 (d, J = 6.43 Hz, 1 H) 7.93-8.00 (m, 1H) 8.01 (d, J = 8.57 Hz, 1 H) 8.12 (d, J = 8.41 Hz, 1 H) 8.59 (s, 1 H)9.74 (br. s., 1 H) 297 C N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-chloro-3-methoxypicolinamide

MS m/z = 439.0 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.56 (s, 1H),8.27 (s, 1H), 7.94 (s, 1H), 7.85 (s, 1H), 7.81 (d, J = 8.8 Hz, 1H), 7.40(d, J = 8.5 Hz, 1H), 5.59 (s, 2H), 4.80 (s, 1H), 4.64 (s, 1H), 3.99-3.87 (m, 4H), 1.72-1.62 (m, 1H), 0.93 (d, J = 4.8 Hz, 1H), 0.90-0.80 (m,1H) 298 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-cyanopyrimidine-2- carboxamide

MS m/z = 416.9 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.86 (s, 1H),9.52 (s, 2H), 7.84-7.69 (m, 2H), 6.44-6.01 (m, 2H), 5.84 (s, 2H), 4.00(br. s., 1H), 2.27 (s, 3H), 1.77-1.65 (m, 1H), 1.13 (br. s., 1H), 0.90(d, J = 7.9 Hz, 1H) 299 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5-methylphenyl)-5- methoxypyrazine-2- carboxamide

MS m/z = 422.1 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.39 (s, 1H),8.88 (d, J = 1.3 Hz, 1H), 8.41 (d, J = 1.3 Hz, 1H), 7.96-7.55 (m, 2H),6.49-5.98 (m, 2H), 5.82 (s, 2H), 4.02 (s, 3H), 2.26 (d, J = 2.2 Hz, 3H),1.83-1.63 (m, 1H), 1.13 (br. s., 1H), 1.01-0.80 (m, 1H) 300 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-methoxy-3- methylpyrazine-2- carboxamide

MS m/z = 436.1 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.35 (s, 1H),8.23 (s, 1H), 7.84-7.76 (m, 1H), 7.71-7.62 (m, 1H), 6.43- 6.02 (m, 2H),5.83 (s, 2H), 4.07-3.90 (m, 4H), 2.74 (s, 3H), 2.26 (s, 3H), 1.77-1.65(m, 1H), 1.18-1.07 (m, J = 3.7 Hz, 1H), 0.98-0.84 (m, 1H) 301 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5- methoxy-3-methylpyrazine-2- carboxamide

MS m/z = 420 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.88 (br. s., 1H),8.22 (s, 1H), 8.08- 7.95 (m, 2H), 7.49 (d, J = 8.8 Hz, 1H), 4.98 (d, J =13.2 Hz, 1H), 4.82 (d, J = 12.9 Hz, 1H), 4.25 (br. s., 1H), 3.99 (s,3H), 2.74 (s, 3H), 1.91 (br. s., 1H), 1.10-0.88 (m, 2H) 302 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-chloro-3-fluoropicolinamide

MS m/z = 443 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.60 (s, 1H),8.73-8.60 (m, 1H), 8.32 (dd, J = 1.9, 10.2 Hz, 1H), 7.79- 7.61 (m, 2H),6.47-5.98 (m, 1H), 5.85 (s, 2H), 4.08-3.91 (m, 1H), 2.26 (d, J = 2.2 Hz,3H), 1.75-1.65 (m, 1H), 1.16-1.08 (m, 1H), 0.96-0.85 (m, 1H) 303 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-chloro-3-methylpicolinamide

MS m/z = 439.1 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.52 (s, 1H),8.57 (d, J = 2.0 Hz, 1H), 8.02 (d, J = 1.8 Hz, 1H), 7.80 (d, J = 3.8 Hz,1H), 7.65 (dd, J = 2.8, 6.6 Hz, 1H), 6.52-5.75 (m, 3H), 4.04 (br. s.,1H), 3.96-3.90 (m, 1H), 2.55 (s, 3H), 2.26 (d, J = 2.0 Hz, 3H),1.79-1.68 (m, 1H), 1.21-1.11 (m, 1H), 0.99-0.90 (m, 1H) 304 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5-methoxypicolinamide

MS m/z = 421.1 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.34 (s, 1H),8.39 (d, J = 2.8 Hz, 1H), 8.12 (d, J = 8.8 Hz, 1H), 7.79 (t, J = 5.8 Hz,2H), 7.62 (dd, J = 2.9, 8.8 Hz, 1H), 6.45-6.00 (m, 1H), 5.83 (s, 2H),4.05- 3.97 (m, 1H), 3.94 (s, 3H), 2.26 (d, J = 2.2 Hz, 3H), 1.78-1.66(m, 1H), 1.14 (br. s., 1H), 0.97-0.86 (m, 1H) 305 A N-(3-((1R,5S,6R)-3-amino-5- (difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-5- methylphenyl)-5- methoxy-3- methylpicolinamide

MS m/z = 435 [M + H]⁺ ¹H NMR (300 MHz, DMSO) Shift = 10.31 (s, 1H), 8.22(d, J = 2.6 Hz, 1H), 7.92-7.74 (m, 1H), 7.68-7.57 (m, 1H), 7.41 (d, J =2.6 Hz, 1H), 6.41- 6.01 (m, 1H), 5.84 (s, 2H), 4.04-3.95 (m, 1H), 3.91(s, 3H), 2.62 (s, 3H), 2.26 (d, J = 2.0 Hz, 3H), 1.77-1.66 (m, 1H),1.17-1.09 (m, 1H), 0.96-0.84 (m, 1H) 306 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-3-fluoro- 5-methoxypicolinamide

MS m/z = 425.1 [M + H]⁺ 1H NMR (400 MHz, MeOH-d4) δ: 8.26 (d, J = 1.6Hz, 1H), 7.82-7.89 (m, 2H), 7.41 (dd, J = 12.7, 2.3 Hz, 1H), 7.18 (dd, J= 11.8, 9.3 Hz, 1H), 6.12- 6.46 (m, 1H), 4.03-4.11 (m, 1H), 4.00 (s,3H), 1.84-1.97 (m, 1H), 1.35 (t, J = 5.8 Hz, 1H), 1.00 (dt, J = 9.5, 6.8Hz, 1H) 307 A N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-fluoro-3-methoxypicolinamide

MS m/z = 425.1 [M + H]⁺ 1H NMR (400 MHz, MeOH-d4) δ: 8.18 (d, J = 2.2Hz, 1H), 7.85-7.91 (m, 1H), 7.80 (dd, J = 6.9, 2.6 Hz, 1H), 7.76-7.82(m, 1H), 7.59 (dd, J = 10.7, 2.2 Hz, 1H), 7.18 (dd, J = 11.7, 8.8 Hz,1H), 6.12-6.45 (m, 1H), 4.03-4.10 (m, 1H), 4.00 (s, 3H), 1.87-1.93 (m,1H), 1.35 (t, J = 6.7 Hz, 1H), 1.00 (dt, J = 9.4, 6.7 Hz, 1H) 308 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-chloro- 3-(fluoromethyl) picolinamide

MS m/z = 442.9 [M + H]⁺ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.85-0.97 (m, 1H) 1.10-1.27 (m, 3 H, contains EtOAc) 1.66-1.81 (m, 1 H) 3.96-4.09 (m, 2H, contains EtOAc) 5.80-6.41 (m, 5 H) 7.15- 7.27 (m, 1 H) 7.79-7.87 (m,1 H) 7.90-7.97 (m, 1 H) 8.16 (d, J = 2.19 Hz, 1 H) 8.76 (d, J = 2.19 Hz,1 H) 10.73 (s, 1 H) 309 A N-(3- (((1R,S),(5S,R),(6R.S))- 3-amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-5-fluoro-4-methylphenyl)-5-cyano- 3-methylpicolinamide

MS m/z = 430.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) δ 10.03 (s, 1H),8.69 (s, 1H), 7.94 (s, 1H), 7.79 (d, J = 11.54 Hz, 1H), 7.63 (s, 1H),5.91- 6.42 (m, 1H), 4.45 (br. s., 2H), 4.00- 4.10 (m, 1H), 2.87 (s, 3H),2.48 (d, J = 2.74 Hz, 3H), 1.75-1.93 (m, 1H), 1.48 (t, J = 5.97 Hz, 1H),0.97-1.13 (m, 1H) 310 A N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-5-fluoro-4-methylphenyl)-5-cyano- 3-methylpicolinamide

MS m/z = 430.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) δ 10.04 (s, 1H),8.69 (d, J = 1.56 Hz, 1H), 7.94 (s, 1H), 7.80 (dd, J = 1.86, 11.44 Hz,1H), 7.63 (s, 1H), 7.58-7.68 (m, 1H), 5.92-6.43 (m, 1H), 4.65 (br. s.,2H), 4.08 (t, J = 5.67 Hz, 1H), 2.86 (s, 3H), 2.78- 2.96 (m, 3H),2.78-2.96 (m, 3H), 2.48 (d, J = 3.13 Hz, 3H), 1.85 (td, J = 7.04, 9.78Hz, 1H), 1.43-1.57 (m, 1H), 0.99- 1.12 (m, 1H). 311 AN-(3-((1S,5R,6S)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-5-fluoro-4- methylphenyl)-5-cyano-3-methylpicolinamide

MS m/z = 430.0 [M + H]⁺ 1H NMR (400 MHz, CHLOROFORM-d) δ 10.02 (s, 1H),8.67 (d, J = 1.56 Hz, 1H), 7.94 (s, 1H), 7.79 (dd, J = 1.96, 11.35 Hz,1H), 7.61 (s, 1H), 5.99-6.47 (m, 1H), 4.62 (br. s., 2H), 4.07 (t, J =5.48 Hz, 1H), 2.86 (s, 3H), 2.48 (d, J = 3.13 Hz, 3H), 1.84 (td, J =7.04, 9.78 Hz, 1H), 1.41-1.58 (m, 1H), 0.95-1.14 (m, 1H). 312 BN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(difluoromethoxy) picolinamide

MS m/z = 442.9 [M + H]⁺ ¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.98-1.14(m, 1 H) 1.49 (br. s., 1 H) 1.96 (q, J = 8.14 Hz, 1 H) 4.05 (br. s., 1H) 6.03-6.92 (m, 2 H) 7.06-7.21 (m, 1 H) 7.66 (d, J = 8.18 Hz, 1 H) 7.72(d, J = 6.72 Hz, 1 H) 7.93-8.06 (m, 1 H) 8.30 (d, J = 8.62 Hz, 1 H) 8.45(s, 1 H) 9.84 (br. s., 1 H) 313 B N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- ethynylpicolinamide

MS m/z = 401 [M + H]⁺ ¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.92-1.10 (m,1 H) 1.45 (t, J = 6.65 Hz, 1 H) 1.91 (dt, J = 9.61, 7.11 Hz, 1 H)3.90-4.08 (m, 1 H) 4.84 (br. s., 1 H) 6.01-6.48 (m, 1 H) 7.11 (dd, J =11.55, 8.92 Hz, 1 H) 7.69 (dd, J = 6.72, 2.78 Hz, 1 H) 7.91-8.06 (m, 2H) 8.24 (dd, J = 8.04, 0.73 Hz, 1 H) 8.67 (d, J = 1.32 Hz, 1 H) 9.90 (s,1 H) 314 B N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5-(prop-1-yn-1-yl)picolinamide

MS m/z = 415 [M + H]⁺ ¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.92-1.07 (m,1 H) 1.44 (t, J = 6.65 Hz, 1 H) 1.83-1.96 (m, 1 H) 2.13 (s, 3 H) 3.93-4.03 (m, 1 H) 4.67 (br. s., 2 H) 6.05- 6.46 (m, 1 H) 7.12 (dd, J =11.54, 8.80 Hz, 1 H) 7.69 (dd, J = 6.75, 2.64 Hz, 1 H) 7.85 (dd, J =8.12, 1.86 Hz, 1 H) 8.01 (dt, J = 8.80, 3.42 Hz, 1 H) 8.19 (d, J = 8.02Hz, 1 H) 8.57 (d, J = 1.37 Hz, 1 H) 9.91 (s, 1 H) 315 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-3-methyl-5-(2,2,2- trifluoroethoxy)pyrazine- 2-carboxamide

MS m/z = 505.9 [M + H]⁺ ¹H NMR (400 MHz, DMSO-d6) δ ppm 10.78 (s, 1 H),8.44 (s, 1 H), 8.00 (dd, J = 11.15, 2.35 Hz, 1 H), 7.92 (s, 1 H), 5.62(s, 2 H), 5.14 (q, J = 9.00 Hz, 2 H), 4.51-4.89 (m, 2 H), 4.00 (m, J =5.67, 5.67 Hz, 1 H), 2.77 (s, 3 H), 1.61 (dt, J = 9.83, 7.02 Hz, 1 H),0.95 (td, J = 6.55, 2.74 Hz, 1 H), 0.84-0.92 (m, 1 H) 316 BN-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-3-methyl-5-(2,2,2- trifluoroethoxy)pyrazine- 2-carboxamide

MS m/z = 505.9 [M + H]⁺ ¹H NMR (400 MHz, DMSO-d6) δ ppm 10.78 (s, 1 H),8.44 (s, 1 H), 8.00 (dd, J = 11.15, 2.35 Hz, 1 H), 7.92 (s, 1 H), 5.62(s, 2 H), 5.14 (q, J = 9.00 Hz, 2 H), 4.51-4.89 (m, 2 H), 4.00 (m, J =5.67, 5.67 Hz, 1 H), 2.77 (s, 3 H), 1.61 (dt, J = 9.83, 7.02 Hz, 1 H),0.95 (td, J = 6.55, 2.74 Hz, 1 H), 0.84-0.92 (m, 1 H) 317 BN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 448 [M + H]⁺ ¹H NMR (400 MHz, DMSO-d6) δ ppm 0.82-1.01 (m, 2H), 1.57-1.66 (m, 1 H), 3.64 (t, J = 2.35 Hz, 1 H), 4.01 (t, J = 5.67Hz, 1 H), 4.53-4.88 (m, 2 H), 5.14 (d, J = 2.35 Hz, 2 H), 5.62 (br s, 2H), 8.00 (dd, J = 11.15, 2.35 Hz, 1 H), 8.08 (s, 1 H), 8.50 (d, J = 1.17Hz, 1 H), 8.92 (d, J = 1.17 Hz, 1 H), 10.80 (s, 1 H) 318 BN-(3-((1S,5R,6S)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4-chloro-5- fluorophenyl)-5-(prop-2-yn-1-yloxy)pyrazine-2- carboxamide

MS m/z = 448 [M + H]⁺ ¹H NMR (400 MHz, DMSO-d6) δ ppm 0.82-1.01 (m, 2H), 1.57-1.66 (m, 1 H), 3.64 (t, J = 2.35 Hz, 1 H), 4.01 (t, J = 5.67Hz, 1 H), 4.53-4.88 (m, 2 H), 5.14 (d, J = 2.35 Hz, 2 H), 5.62 (br s, 2H), 8.00 (dd, J = 11.15, 2.35 Hz, 1 H), 8.08 (s, 1 H), 8.50 (d, J = 1.17Hz, 1 H), 8.92 (d, J = 1.17 Hz, 1 H), 10.80 (s, 1 H) 441 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-chloro- 3-(fluoromethyl) picolinamide

MS m/z = 441 [M]⁺ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.81-0.90 (m, 1 H)0.91-0.99 (m, 1 H) 1.62-1.71 (m, 1 H) 3.29- 3.32 (m, 2 H) 3.93-3.99 (m,1 H) 4.59-4.86 (m, 2 H) 5.54-5.65 (m, 2 H) 5.84-5.93 (m, 1 H) 5.97-6.04(m, 1 H) 7.36-7.50 (m, 1 H) 7.79-7.87 (m, 1H) 8.05-8.11 (m, 1 H) 8.13-8.19 (m, 1 H) 8.74-8.82 (m, 1 H) 10.70-10.82 (m, 1 H) 442 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5-chloro-3-fluoropicolinamide

MS m/z = 427 [M]⁺ 1H NMR (300 MHz, DMSO) Shift = 10.74 (s, 1H),10.82-10.63 (m, 1H), 8.74-8.57 (m, 1H), 8.33 (dd, J = 1.9, 10.4 Hz, 1H),8.04 (d, J = 2.5 Hz, 1H), 7.82 (dd, J = 2.6, 8.6 Hz, 1H), 7.43 (d, J =8.5 Hz, 1H), 5.83-5.43 (m, 2H), 4.81 (s, 1H), 4.65 (s, 1H), 3.97 (br.s., 1H), 1.67 (td, J = 6.9, 9.5 Hz, 1H), 0.95 (d, J = 4.2 Hz, 1H), 0.86(td, J = 6.3, 9.5 Hz, 1H) 443 A N-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3- en-5-yl)-4-chlorophenyl)-5-chloro- 3-methylpicolinamide

MS m/z = 423 [M]⁺ 1H NMR (300 MHz, DMSO) Shift = 10.65 (s, 1H), 8.59 (d,J = 2.2 Hz, 1H), 8.05-8.03 (m, 1H), 8.02 (d, J = 2.6 Hz, 1H), 7.85 (dd,J = 2.6, 8.7 Hz, 1H), 7.41 (d, J = 8.6 Hz, 1H), 5.62 (s, 2H), 4.88-4.74(m, 1H), 4.71-4.60 (m, 1H), 3.95 (br. s., 1H), 2.56 (s, 3H), 1.73- 1.61(m, 1H), 0.96-0.90 (m, 1H), 0.85 (td, J = 6.2, 9.4 Hz, 1H) 444 AN-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-4-chloro-2- (fluoromethyl)benzamide

MS m/z = 457 [M + H]⁺ 1H NMR (300 MHz, DMSO) Shift = 10.65 (s, 1H), 8.77(d, J = 2.3 Hz, 1H), 8.16 (d, J = 2.3 Hz, 1H), 7.85-7.75 (m, 1H), 7.70(dd, J = 2.6, 6.4 Hz, 1H), 6.42-6.03 (m, 1H), 6.02 (s, 1H), 5.89- 5.84(m, 3H), 4.06-3.96 (m, 1H), 2.26 (d, J = 2.0 Hz, 3H), 1.70 (dd, J = 7.2,16.6 Hz, 1H), 1.14 (d, J = 5.8 Hz, 1H), 0.97-0.85 (m, 1H) 445 AN-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)- 2-oxa-4-azabicyclo[4.1.0]hept-3- en-5-yl)-4- chlorophenyl)-5- fluoropicolinamide

MS m/z = 393 [M + H]⁺ 1H NMR (300 MHz, DMSO) Shift = 10.94 (br. s., 1H),8.73 (d, J = 2.6 Hz, 1H), 8.36-8.14 (m, 2H), 8.09-7.91 (m, 2H), 7.49 (d,J = 8.8 Hz, 1H), 5.10- 4.72 (m, 2H), 4.22 (br. s., 1H), 1.98- 1.78 (m,1H), 1.22 (d, J = 13.3 Hz, 1H), 1.01 (d, J = 8.0 Hz, 1H)

Examples 319 and 320

Step 1:N-(3-((1S,5R,6S)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(319a) andN-(3-((1R,5S,6R)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(320a)

N-[3-[(1(S,R),5(R,S),6(S,R)]-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl]-5-methoxypyrazine-2-carboxamide(912 mg, 1.92 mmol) was prepared by a similar procedure to thatdescribed in step 1 for the synthesis of 2a rac, but usingN-[[1(S,R),5(R,S),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl]benzamide(3g-rac). The product was subsequently subjected to chromatography usingsupercritical CO₂ (additives: 20% iPrOH with 20 mM Ammonia in MeOH) on aOJ-H column (250×30 mm, 5 μm) eluting at a flow rate of 120 ml/min (100bar pressure, 40° C. column temperature). The first peak (retentiontime=3.62 min) providedN-(3-((1S,5R,6S)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(319a) (0.341 g, 0.717 mmol, 39.3% yield; 99% de; 99% ee) as a whitesolid. The second peak (retention time=4.38 min) provided N-(3-((1R, 5S,6R)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(320a) (0.343 g, 0.722 mmol, 39.5% yield; 99% de; 99% ee) as a whitesolid. MS m/z=476 [M+H]⁺ (for both enantiomers). Calculated forC₂₅H₂₂FN₅O₄: 475.47

Step 2a:N-(3-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(Example 319)

A sealed vial was charged withN-(3-41S,5R,6S)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(319a, 0.341 g, 0.717 mmol) and ammonia (2.0M solution in methanol; 7.17ml, 14.34 mmol, Aldrich). The reaction mixture was heated to 80° C. for24 h. The reaction was concentrated under reduced pressure and purifiedvia silica gel flash chromatography using a gradient of 0-10% (2Mammonia in MeOH)/DCM to afford the title compound as a white solid.(0.129 g, 0.347 mmol, 48.4% yield).

MS m/z=372 [M+H]⁺. Calculated for C₁₈H₁₈FN₅O₃: 371.366

¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.87 (dt, J=9.61, 6.60 Hz, 1H) 1.00(td, J=6.91, 2.70 Hz, 1H) 1.66 (d, J=1.02 Hz, 3H) 1.75-1.85 (m, 1H) 3.95(td, J=6.80, 2.63 Hz, 1H) 4.07 (s, 3H) 7.07 (dd, J=11.55, 8.77 Hz, 1H)7.53 (dd, J=7.02, 2.78 Hz, 1H) 7.86-7.93 (m, 1H) 8.15 (d, J=1.32 Hz, 1H)9.01 (d, J=1.32 Hz, 1H) 9.46 (br. s., 1H)

Step 2b:N-(3-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(Example 320)

The title compound was prepared by steps and procedures similar to thosedescribed in step 2a for the synthesis of 319, but starting withN-(3-((1R,5S,6R)-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-methoxypyrazine-2-carboxamide(320a). MS m/z=372 [M+H]⁺. Calculated for C₁₈H₁₈FN₅O₃: 371.366.

¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.86-0.96 (m, 1H) 0.98-1.07 (m, 1H)1.69 (d, J=1.17 Hz, 3H) 1.77-1.88 (m, 1H) 3.96-4.04 (m, 1H) 4.08 (s, 3H)7.09 (dd, J=11.55, 8.77 Hz, 1H) 7.55 (dd, J=7.02, 2.78 Hz, 1H) 7.86-7.95(m, 1H) 8.16 (d, J=1.32 Hz, 1H) 9.02 (d, J=1.32 Hz, 1H) 9.48 (br. s.,1H)

General Metal-Catalyzed Amidation Procedures:

The following three (3) methods were used to couple the bromide coreintermediates with corresponding amides to prepare compounds of theinvention.

Method E Copper (Cu) Catalyzed Amidation Procedure Example 321 Synthesisof racN-(6-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide

A sealable tube was charged with mixture of 17d rac (55 mg, 0.164 mmol),5-chloropicolinamide (38.4 mg, 0.245 mmol), potassium carbonate (90 mg,0.655 mmol) and copper (I) iodide (9.35 mg, 0.049 mmol). The vial wasevacuted and backfilled with nitrogen gas. Dioxane (1 mL) was added,followed by (1R, 2R)-(−)-N,N″-dimethylcyclohexane-1,2-diamine (7.74 μl,0.049 mmol). The reaction vial was sealed and heated to 100° C. for 2 h.The reaction mixture was cooled and purified by silica gel flashchromatography, eluting with a gradient of DCM/EtOAc=4:1 to 3:1 to 2:1to 1:1 to 1:2. The title compound was obtained as an off white solid (30mg, 0.073 mmol, 44.5% yield). MS m/z=412 [M+H]⁺

1H NMR (400 MHz, CHLOROFORM-d) d=10.29 (br. s., 1H), 8.62 (d, J=2.0 Hz,1H), 8.38 (dd, J=3.0, 8.9 Hz, 1H), 8.25 (d, J=8.4 Hz, 1H), 7.90 (dd,J=2.2, 8.3 Hz, 1H), 7.51 (t, J=9.7 Hz, 1H), 6.77-6.35 (m, 1H), 4.24-4.06(m, 1H), 1.93-1.77 (m, 1H), 1.53 (br. s., 1H), 1.16-0.99 (m, 1H).

Method F Palladium (Pd) Catalyzed Amidation Procedure Examples 322 & 323Synthesis ofN-(6-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-methoxypyrazine-2-carboxamide(Eg 322)

andN-(6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-methoxypyrazine-2-carboxamide(eg 323)

A sealable vial was charged with 4d rac (0.2 g, 0.666 mmol),5-methoxypyrazine-2-carboxamide (0.148 g, 0.966 mmol),(9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (0.116 g,0.200 mmol), Pd2(dba)3 (0.046 g, 0.050 mmol), and cesium carbonate(0.543 g, 1.666 mmol). The vial was evacuated and backfilled with N₂gas. 1,4-Dioxane (2.5 mL) was added and the reaction mixture was stirredin a pre-heated 100° C. oil bath for 15.5 hours. The reaction mixturewas cooled to RT and diluted with water and EtOAc. The organic layer waswashed with water, brine and dried over magnesium sulfate. The filtratewas concentrated under reduced pressure. The crude residue wastriturated with EtOAc and the solid was collected by filtration. Thematerial was taken up in EtOAc and washed with water and brine. Theorganic layer was dried over magnesium sulfate and the filtrate wasconcentrated under reduced pressure to afford N-(6-(((1R,S), (5S,R),(6R,S))-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-methoxypyrazine-2-carboxamide(0.164 g, 0.440 mmol, 66% yield). This material was subjected tochromatography using supercritical CO₂ (additives 20% MeOH with 20 mMNH₃) on a CHIRALPAK AS-H SFC column (21×250 mm, 5 μm) eluting at a flowrate 75 ml/min (100 bar pressure, 40° C. column temperature). The firstpeak (retention time=1.16 min) provided(N-(6-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-methoxypyrazine-2-carboxamide(Example 322, 32.1 mg, 0.086 mmol, 32.1% yield, 99% de; 99% ee). Thesecond peak (retention time=3.43 min) providedN-(6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-methoxypyrazine-2-carboxamide(Example 323, 33.4 mg, 0.090 mmol, 33.4% yield; 99% de; 99% ee). MSm/z=373 [M+H]⁺. (for both enantiomers)

Peak 1: 1H NMR (300 MHz, DMSO-d6) δ ppm 0.73 (d, J=5.70 Hz, 1H) 0.82(dt, J=9.72, 6.18 Hz, 1H) 1.43-1.51 (m, 1H) 1.54 (s, 3H) 4.01-4.07 (m,4H) 5.26 (br. s., 2H) 7.72 (dd, J=10.96, 8.77 Hz, 1H) 8.14 (dd, J=8.84,2.85 Hz, 1H) 8.47 (d, J=1.32 Hz, 1H) 8.95 (d, J=1.17 Hz, 1H) 9.96 (s,1H)Peak 2: 1H NMR (300 MHz, DMSO-d6) δ ppm 0.67-0.77 (m, 1H) 0.77-0.87 (m,1H) 1.47 (d, J=9.65 Hz, 1H) 1.53 (s, 3H) 4.00-4.13 (m, 4H) 5.24 (br. s.,2H) 7.72 (dd, J=11.04, 8.84 Hz, 1H) 8.14 (dd, J=8.70, 2.85 Hz, 1H) 8.46(d, J=1.17 Hz, 1H) 8.95 (d, J=1.32 Hz, 1H) 9.96 (br. s., 1H)

Synthesis ofN-(6-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-cyanopicolinamide(Example 324) and

N-6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-cyanopicolinamide(Example 325)

The title compounds were synthesized according to procedure F, but using5-cyanopicolinamide,

MS m/z=367 [M+H]⁺. (for both enantiomers)

Eg 324: 1H NMR (300 MHz, DMSO-d6) δ ppm 0.67-0.78 (m, 1H) 0.78-0.87 (m,1H) 1.43-1.52 (m, 1H) 1.54 (s, 3H) 4.02-4.08 (m, 1H) 5.25 (br. s., 2H)7.74 (dd, J=10.96, 8.77 Hz, 1H) 8.33-8.37 (m, 1H) 8.63 (dd, J=8.18, 1.90Hz, 1H) 9.22-9.27 (m, 1H) 10.29 (br. s., 1H)Eg 325: 1H NMR (300 MHz, DMSO-d6) δ ppm 0.69-0.77 (m, 1H) 0.78-0.90 (m,1H) 1.43-1.52 (m, 1H) 1.54 (s, 3H) 4.01-4.09 (m, 1H) 5.25 (br. s., 2H)7.74 (dd, J=10.89, 8.84 Hz, 1H) 8.16 (dd, J=8.84, 3.00 Hz, 1H) 8.32-8.37(m, 1H) 8.60-8.66 (m, 1H) 9.22-9.27 (m, 1H) 10.30 (br. s., 1H)

Method G Pd-Catalyzed Amidation Followed by Deprotection of BenzoylGroup Examples 326 & 327 Synthesis ofN-(6-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(Eg 326)

AndN-(6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(Eg 327)

Step 1:

A sealable vial was charged with N-[(1R,S), (5S,R),(6R,S)]-5-(6-bromo-3-fluoropyridin-2-yl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide4c rac (0.57 g, 1.410 mmol), 5-chloropicolinamide (0.320 g, 2.045 mmol),(9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (0.245 g,0.423 mmol), Pd2(dba)3 (0.097 g, 0.106 mmol), and cesium carbonate(1.149 g, 3.53 mmol). The vial was evacuated and backfilled with N₂ gas.1,4-Dioxane (5 mL) was added and the reaction mixture was stirred in apre-heated 100° C. oil bath over for 15.5 hours. The reaction mixturewas cooled to RT and diluted with water and EtOAc. The organic layer waswashed with water, brine and dried over magnesium sulfate. The filtratewas concentrated under reduced pressure. The crude residue was purifiedvia silica gel column chromatography (5-60% EtOAc:Hexanes) to affordN-(6-(((1R,S),(5S,R),(6R,S)]-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(0.554 g, 1.154 mmol, 82% yield). MS m/z=479.9 [M]

Step 2:

A microwave vial was charged with N-(6-(((1R,S),(5S,R),(6R,S)]-3-benzamido-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(0.554 g, 1.154 mmol), MeOH (4.62 ml) and DBU (0.696 ml, 4.62 mmol). Thereaction mixture was heated to 75° C. for 3 h in the microwave. Thesolid was collected by vacuum filtration to affordN-(6-(((1R,S),(5S,R),(6R,S))-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(0.309 g, 0.822 mmol, 71.2% yield). This material was subjected tochromatography using supercritical CO₂ (additives 20% MeOH with 20 mMNH₃) on a CHIRALPAK AS-H SFC column (21×250 mm, 5 μm) eluting at a flowrate 75 ml/min (100 bar pressure, 40° C. column temperature). The firstpeak (retention time=1.26 min) provided(N-(6-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide((Example 326, 115 mg, 0.306 mmol, 38.1% yield, 99% de; 99% ee). Thesecond peak (retention time=1.95 min) providedN-(6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(N-(6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-5-chloropicolinamide(Example 327, 123.1 mg, 0.328 mmol, 40.8% yield; 99% de; 99% ee)

MS m/z=375.9 [M+H]⁺. (for both enantiomers)

Peak 1: 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.97 (dt, J=9.83, 6.70 Hz,1H) 1.05-1.13 (m, 1H) 1.67-1.74 (m, 1H) 1.77 (s, 3H) 4.10-4.17 (m, 1H)7.46 (dd, J=10.60, 8.84 Hz, 1H) 7.89 (dd, J=8.33, 2.34 Hz, 1H) 8.25 (d,J=8.33 Hz, 1H) 8.31 (dd, J=8.77, 3.07 Hz, 1H) 8.62 (d, J=1.90 Hz, 1H)10.24 (br. s., 1H)Peak 2: 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.88-0.98 (m, 1H) 1.03 (td,J=6.94, 2.92 Hz, 1H) 1.66 (dt, J=9.79, 7.23 Hz, 1H) 1.73 (s, 3H)4.06-4.14 (m, 1H) 7.45 (dd, J=10.60, 8.84 Hz, 1H) 7.89 (dd, J=8.33, 2.34Hz, 1H) 8.25 (d, J=8.33 Hz, 1H) 8.30 (dd, J=8.77, 2.92 Hz, 1H) 8.61 (d,J=2.19 Hz, 1H) 10.24 (br. s., 1H)

Synthesis ofN-(6-((1R,5S,6R)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-3,5-dichloropicolinamide(Example 328)

AndN-(6-((1S,5R,6S)-3-amino-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoropyridin-2-yl)-3,5-dichloropicolinamide(Example 329)

The title compounds were synthesized according to procedure G, but using3,5-dichloropicolinamide.

MS m/z=409.9 [M+H]⁺. (for both enantiomers)

Peak 1: 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.98-1.09 (m, 1H) 1.11-1.20(m, 1H) 1.72-1.85 (m, 4H) 4.14-4.22 (m, 1H) 7.49 (dd, J=10.45, 8.84 Hz,1H) 7.92 (d, J=2.05 Hz, 1H) 8.35 (dd, J=8.92, 3.07 Hz, 1H) 8.56 (d,J=2.05 Hz, 1H) Peak 2: 1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.91-1.00(m, 1H) 1.03-1.11 (m, 1H) 1.65-1.73 (m, 1H) 1.74 (s, 3H) 4.08-4.15 (m,1H) 7.46 (dd, J=10.52, 8.77 Hz, 1H) 7.92 (d, J=2.05 Hz, 1H) 8.32 (dd,J=8.84, 3.00 Hz, 1H) 8.54 (d, J=2.05 Hz, 1H) Examples 330-336

Using procedures similar to one of the general metal-catalyzed amidationprocedures described above, the appropriate bromide and amide werecombined to prepare the examples listed in Table 2:

TABLE 2 Example # Method Compound Name Compound Structure AnalyticalData 330 E N-(6- 9((1RS),(5S,R),(6R,S))- 3-amino-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-5- fluoropyridin-2-yl)-5-cyanopicolinamide

MS m/z = 403 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d = 10.28 (s, 1 H),8.94 (d, J = 1.2 Hz, 1 H), 8.43 (d, J = 8.2 Hz, 1 H), 8.37 (dd, J = 2.9,8.8 Hz, 1 H), 8.22 (dd, J = 2.1, 8.1 Hz, 1 H), 7.52 (dd, J = 9.0, 10.2Hz, 1 H), 6.72-6.32 (m, 1 H), 4.11 (t, J = 5.3 Hz, 1 H), 1.89-1.74 (m, 1H), 1.51 (t, J = 6.5 Hz, 1 H), 1.13-1.00 (m, 1 H) 331 EN-(6-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-5- fluoropyridin-2-yl)-5-cyanopicolinamide

MS m/z = 403 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d = 10.28 (s, 1 H),8.94 (d, J = 1.2 Hz, 1 H), 8.43 (d, J = 8.2 Hz, 1 H), 8.37 (dd, J = 2.9,8.8 Hz, 1 H), 8.22 (dd, J = 2.1, 8.1 Hz, 1 H), 7.52 (dd, J = 9.0, 10.2Hz, 1 H), 6.72-6.32 (m, 1 H), 4.11 (t, J = 5.3 Hz, 1 H), 1.89-1.74 (m, 1H), 1.51 (t, J = 6.5 Hz, 1 H), 1.13-1.00 (m, 1 H) 332 E(1R,5S,6R)-5-(5-((3- (5-chloropyridin-2- yl)oxetan-3- yl)amino)-2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 438.8 [M]+ 1H NMR (400 MHz, CHLOROFORM-d) d = 8.65 (d, J = 2.3Hz, 1 H), 7.58 (dd, J = 2.5, 8.4 Hz, 1 H), 7.43 (d, J = 8.6 Hz, 1 H),6.82 (dd, J = 8.7, 11.6 Hz, 1 H), 6.51 (dd, J = 2.8, 6.4 Hz, 1 H),6.37-5.98 (m, 2 H), 5.26 (d, J = 6.1 Hz, 1 H), 5.15 (d, J = 6.3 Hz, 1H), 4.80 (d, J = 6.1 Hz, 2 H), 3.88 (t, J = 5.3 Hz, 1 H), 1.86-1.75 (m,1 H), 1.38 (t, J = 7.1 Hz, 1 H), 1.00-0.89 (m, 1 H) 333 E N-(5-((1(R,S),5(S,R),6(R,S)- 3-amino-5-methyl 2-oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-6- fluoropyridin-3-yl)-5- chloropicolinamide

MS m/z = 376.4 [M + H]+ 1H NMR (MeOH) d: 8.73 (d, J = 2.2 Hz, 1H),8.58-8.66 (m, 1H), 8.43 (dd, J = 9.0, 2.5 Hz, 1H), 8.22 (d, J = 8.4 Hz,1H), 8.09 (dd, J = 8.4, 2.3 Hz, 1H), 4.02-4.25 (m, 1H), 1.76- 1.89 (m,1H), 1.70 (s, 3H), 1.31 (s, 1H), 1.06 (dt, J = 6.8, 3.3 Hz, 1H),0.93-1.02 (m, 1H) 334 E N-(5-((1R,5S,6R)-3- amino-5-methyl-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-6- fluoropyridin-3-yl)-5-chloropicolinamide

MS m/z = 376.4 [M + H]+ 1H NMR (MeOH) d: 8.74 (d, J = 2.0 Hz, 1H), 8.63(s, 1H), 8.43 (dd, J = 8.9, 2.4 Hz, 1H), 8.23 (d, J = 8.4 Hz, 1H), 8.11(dd, J = 8.4, 2.3 Hz, 1H), 4.14 (t, J = 5.3 Hz, 1H), 1.82 (d, J = 9.6Hz, 1H), 1.70 (s, 3H), 1.02- 1.17 (m, 1H), 0.98 (dd, J = 9.7, 6.4 Hz,1H) 335 E N-(5-((1S,5R,6S)-3- amino-5-methyl-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-6- fluoropyridin-3-yl)-5-chloropicolinamide

MS m/z = 376.4 [M + H]+ 1H NMR (MeOH) d: 8.74 (d, J = 2.0 Hz, 1H), 8.63(s, 1H), 8.42 (dd, J = 9.0, 2.5 Hz, 1H), 8.23 (d, J = 8.2 Hz, 1H), 8.11(dd, J = 8.4, 2.3 Hz, 1H), 4.12 (t, J = 5.4 Hz, 1H), 1.81 (d, J = 9.6Hz, 1H), 1.69 (s, 3H), 1.01- 1.09 (m, 1H), 0.90-1.00 (m, 1H) 336 E N-(5-((l(R,S),5(S,R),6(R,S))- 3-amino-5-methyl- 2-oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-6- fluoropyridin-3-yl)-5-methoxypyrazine-2- carboxamide

MS m/z = 373 [M + H]+ 1H NMR (MeOH) d: 8.97 (s, 1H), 8.57-8.74 (m, 2H),8.35 (s, 1H), 4.63 (d, J = 3.7 Hz, 1H), 4.12 (s, 3H), 2.07 (d, J = 9.8Hz, 1H), 1.93 (s, 3H), 1.37- 1.46 (m, 1H), 1.24-1.34 (m, 1H)

Method H Examples 337 & 338 Synthesis of(1S,5S,6S)-5-(2-fluoro-5-(3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Eg 337)

and(1R,5R,6R)-5-(2-fluoro-5-((3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Eg 338)

A sealable vial was charged with and[1(S,R),5(S,R),6(S,R)]-5-(5-amino-2-fluorophenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(1k rac; 350 mg, 1.488 mmol) and 8-chloro-3-methoxy-1,7-naphthyridine(Intermediate 2; 304 mg, 1.56 mmol). Iso-propanol (6.8 mL) and sulfuricacid (103 μl, 1.93 mmol) were added and the mixture was heated to 55° C.for 20 min. The cooled reaction mixture was diluted with water andextracted with EtOAc. The aqueous phase was neutralized with aqueoussaturated sodium bicarbonate solution. The solution was extracted threetimes with EtOAc. The combined organic phases were separated and driedover MgSO₄. The solvent was removed under reduced pressure. The residuewas washed with Et₂O to obtain[1(S,R),5(S,R),6(S,R)]-5-(2-fluoro-5-((3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineas a beige solid (290 mg). The solid was subjected to chromatographyusing supercritical CO₂ (additives 50% MeOH with 20 mM NH₃) on a AD-Hcolumn (21×250 mm, 5 μm) eluting at a flow rate 50 ml/min (100 barpressure, 40° C. column temperature). The first peak (retentiontime=1.24 min) provided(1S,5S,6S)-5-(2-fluoro-5-((3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 337, 122 mg, 0.310 mmol, 20.84% yield; 99% de; 99% ee) as alight-yellow powder. The second peak (retention time=2.33 min) provided(1R,5R,6R)-5-(2-fluoro-5-((3-methoxy-1,7-naphthyridin-8-yl)amino)phenyl)-5-methyl-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 338; 110 mg, 0.280 mmol, 18.79% yield; 99% de; 99% ee) as alight-yellow powder.

MS m/z=394.1 [M+H]⁺. Calculated for C₂₁H₂₀FN₅O₂: 393.41 (for bothenantiomers)

¹H NMR (312; 300 MHz, DMSO-d₆) δ ppm 0.38 (td, J=6.36, 2.92 Hz, 1H) 0.61(dt, J=9.50, 6.21 Hz, 1H) 1.59 (s, 3H) 1.64-1.80 (m, 1H) 3.97 (s, 3H)3.99-4.08 (m, 1H) 5.40 (s, 2H) 7.02-7.15 (m, 2H) 7.70 (d, J=2.78 Hz, 1H)7.92 (dd, J=7.09, 2.85 Hz, 1H) 8.02 (d, J=5.70 Hz, 1H) 8.11-8.27 (m, 1H)8.61 (d, J=2.78 Hz, 1H) 9.19 (s, 1H)

¹H NMR (313; 300 MHz, DMSO-d₆) δ ppm 0.39 (td, J=6.43, 2.92 Hz, 1H) 0.61(dt, J=9.57, 6.25 Hz, 1H) 1.59 (s, 3H) 1.64-1.77 (m, 1H) 3.97 (s, 3H)4.00-4.10 (m, 1H) 5.41 (s, 2H) 7.00-7.18 (m, 2H) 7.70 (d, J=2.78 Hz, 1H)7.93 (dd, J=7.16, 2.92 Hz, 1H) 8.03 (d, J=5.70 Hz, 1H) 8.12-8.26 (m, 1H)8.61 (d, J=2.78 Hz, 1H) 9.19 (s, 1H)

Examples 339-365

The examples in Table 3 were synthesized following a procedure analogousto Method H

TABLE 3 Example No Compound Name Compound Structure Analytical Data 339(1S,5R,6S)-5-(2- fluoro-5-((3- methoxy-1,7- naphthyridin-8-yl)amino)phenyl)- 5-methyl-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 394.0 [M + H]⁺. ¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.81- 0.92(m, 1 H) 0.96-1.05 (m, 1 H) 1.68 (s, 3 H) 1.78-1.88 (m, 1 H) 3.92-4.00(m, 4 H) 6.91 (d, J = 5.85 Hz, 1 H) 7.08 (dd, J = 11.77, 8.84 Hz, 1 H)7.23 (d, J = 2.63 Hz, 1 H) 7.69 (dd, J = 7.23, 2.56 Hz, 1 H) 8.01-8.13(m, 2 H) 8.50 (d, J = 2.48 Hz, 1 H) 8.86 (s,1 H) 340 (1R,5S,6R)-5-(2-fluoro-5-((3- methoxy-1,7- naphthyridin-8- yl)amino)phenyl)-5-methyl-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 394.0 [M + H]⁺. ¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.85 (dt,J = 9.61, 6.60 Hz, 1 H) 1.00 (td, J = 6.91, 2.41 Hz, 1 H) 1.67 (s, 3 H)1.77-1.87 (m, 1 H) 3.90- 4.01 (m, 4 H) 6.90 (d, J = 5.85 Hz, 1 H) 7.07(dd, J = 11.69, 8.77 Hz, 1 H) 7.22 (d, J = 2.63 Hz, 1 H) 7.67 (dd, J =7.16, 2.63 Hz, 1 H) 8.02-8.12 (m, 2 H) 8.49 (d, J = 2.63 Hz, 1 H) 8.85(s, 1 H) 341 (1S,5S,6S)-5-(5- ((3-chloro-1,7- naphthyridin-8-yl)amino)-2,3- difluorophenyl)-5- (fluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 434.2 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 8.87 (s, 1H), 8.60 (s, 1 H), 8.32 (ddd, J = 12.42, 6.94, 2.35 Hz, 1 H), 8.07 (d, J= 5.67 Hz, 1 H), 7.96 (d, J = 2.15 Hz, 1 H), 7.32-7.45 (m, 1 H), 6.90(s, 1 H), 4.79 (s, 1 H), 4.67 (s, 1 H), 3.97 (br. s., 1 H), 1.70-1.85(m, 1 H), 1.17-1.34 (m, 2 H), 0.77-1.01 (m, 2 H) 342 (1R,5S,6R)-5-(5-((3-chloro-1,7- naphthyridin-8- yl)amino)-2,3- difluorophenyl)-5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 434.2 [M + H]+ 1H NMR (400 MHz, CHLOROFORM-d) d ppm 8.86 (br.s., 1 H), 8.59 (s, 1 H), 8.28- 8.38 (m, 1 H), 8.07 (d, J = 5.67 Hz, 1H), 7.96 (s, 1 H), 7.35 (br. s., 1 H), 6.89 (d, J = 5.67 Hz, 1 H), 4.78(s, 1 H), 4.66 (s, 1 H), 3.96 (br. s., 1 H), 1.76 (q, J = 7.69 Hz, 1 H),1.16-1.33 (m, 1 H), 0.92 (q, J = 7.50 Hz, 1 H). Note NH2 is very broadaround 5.5 to 4 ppm 343 8-((3-((1R,5S,6R)- 3-amino-5- (fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)-5-fluoro-1,7- naphthyridine-3-

MS m/z = 425.2 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 9.71 (s, 1 H),9.32 (d, J = 1.96 Hz, 1 H), 9.13 (d, J = 1.76 Hz, 1 H), 8.32 (dd, J =7.34, 2.64 Hz, 1 H), 8.25 (s, 1 H), 7.93 (dt, J = 8.66, 3.50 Hz, 1 H),7.15 (dd, J = 11.83, 8.90 Hz, carbonitrile 1 H), 5.69 (br. s., 2 H),4.43- 4.73 (m, 2 H), 4.01 (t, J = 5.77 Hz, 1 H), 1.49-1.66 (m, 1 H),1.03 (td, J = 6.21, 2.25 Hz, 1 H), 0.82 (dt, J = 9.24, 6.43 Hz, 1 H).344 (1R,5S,6R)-5-(2- fluoro-5-((5-fluoro- 3-methoxy-1,7- naphthyridin-8-yl)amino)phenyl)- 5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 430 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 9.35 (s, 1 H),8.71 (d, J = 2.93 Hz, 1 H), 8.22 (dd, J = 7.43, 2.74 Hz, 1 H), 8.09 (d,J = 1.56 Hz, 1 H), 7.93-8.00 (m, 1 H), 7.71 (d, J = 2.74 Hz, 1 H), 7.12(dd, J = 11.74, 8.80 Hz, 1 H), 5.68 (s, 2 H), 4.43-4.73 (m, 2 H),3.97-4.07 (m, 4 H), 1.56-1.66 (m, 1 H), 1.02 (td, J = 6.41, 2.64 Hz, 1H), 0.81 (dt, J = 9.29, 6.41 Hz, 1 H). 345 (1R,5S,6R)-5-(5-((3-chloro-1,7- naphthyridin-8- yl)amino)-2- fluorophenyl)-5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 416 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 9.58 (s, 1 H),8.90 (d, J = 2.35 Hz, 1 H), 8.51 (d, J = 2.35 Hz, 1 H), 8.22 (dd, J =7.24, 2.74 Hz, 1 H), 8.14 (d, J = 5.67 Hz, 1 H), 8.03 (dt, J = 8.36,3.64 Hz, 1 H), 7.10-7.19 (m, 2 H), 5.68 (br. s., 2 H), 4.41- 4.74 (m, 2H), 4.02 (t, J = 5.58 Hz, 1 H), 1.56-1.66 (m, 1 H), 1.02 (td, J = 6.16,2.35 Hz, 1 H), 0.82 (dt, J = 9.34, 6.48 Hz, 1 H). 346 8-((3-((1R,5S,6R)-3-amino-5- (fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)amino)- 1,7- naphthyridine-3-

MS m/z = 407 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 9.72 (s, 1 H),9.21 (d, J = 1.76 Hz, 1 H), 8.87-9.06 (m, 1 H), 8.25 (dd, J = 7.34, 2.64Hz, 1 H), 8.22 (d, J = 5.87 Hz, 1 H), 8.02 (dt, J = 8.56, 3.55 Hz, 1 H),7.22 (d, J = 5.67 Hz, 1H), 7.16 (dd, J = 8.80, 11.74 Hz, 1H), 5.75 (s, 2carbonitrile H), 4.39-4.75 (m, 2 H), 3.90- 4.10 (m, 1 H), 1.49-1.69 (m,1 H), 1.03 (d, J = 1.96 Hz, 1 H), 0.83 (dt, J = 9.24, 6.33 Hz, 1 H). 347(1R,5S,6R)-5-(5- ((7- chloropyrido[3,2- d]pyrimidin-4- yl)amino)-2-fluorophenyl)-5- (fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-

MS m/z = 417 [M + H]+ 1H NMR (400 MHz, DMSO d6) d ppm 10.42 (s, 1 H),8.93 (d, J = 2.35 Hz, 1 H), 8.67 (s, 1 H), 8.39 (d, J = 2.15 Hz, 1 H),8.27 (dd, J = 7.43, 2.74 Hz, 1 H), 7.90 (dt, J = 8.17, 3.64 Hz, 1 H),7.20 (dd, J = 11.83, 8.90 Hz, 1 H), 5.67 (br. s., 2 H), 3-en-3-amine4.40-4.75 (m, 2 H), 4.03 (t, J = 5.67 Hz, 1 H), 1.54-1.66 (m, 1 H), 1.02(td, J = 6.11, 2.25 Hz, 1 H), 0.83 (dt, J = 9.44, 6.43 Hz, 1 H). 348(1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((3- methoxy-1,7-naphthyridin-8- yl)amino)phenyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 430[M + H]+ 1H NMR (MeOH) d: 8.57 (d, J = 2.7 Hz, 1H), 8.03(dd, J = 6.9, 2.8 Hz, 1H), 7.99 (d, J = 5.9 Hz, 1H), 7.95 (ddd, J = 8.8,4.2, 2.8 Hz, 1H), 7.56 (d, J = 2.7 Hz, 1H), 7.16 (dd, J = 11.9, 8.8 Hz,1H), 7.08 (d, J = 5.9 Hz, 1H), 6.16- 6.51 (m, 1H), 4.06-4.13 (m, 1H),4.02 (s, 3H), 1.86-2.01 (m, 1H), 1.32-1.43 (m, 1H), 1.00 (dt, J = 9.3,6.7 Hz, 1H) 349 8-((3- ((1(R,S),5(S,R),6(R, S))-3-amino-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)amino)- 5-fluoro-1,7-

MS m/z = 458.9 [M + H]+ 1H NMR (300MHz, DMSO-d6) d = 9.84 (s, 1 H), 9.34(d, J = 1.9 Hz, 1 H), 9.17 (d, J = 1.9 Hz, 1 H), 8.74 (d, J = 2.5 Hz, 1H), 8.33 (s, 1 H), 7.95 (dd, J = 2.4, 8.8 Hz, 1 H), 7.42 (d, J = 8.5 Hz,1 H), 7.02-6.51 (m, 1 H), 5.94 (s, 2 H), 3.95 (br. s., 1 H), 2.05-1.88naphthyridine-3- (m, 1 H), 1.12 (br. s., 1 H), 1.01- carbonitrile 0.85(m, 1 H). 350 8-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)amino)- 5-fluoro-1,7-naphthyridine-3-

MS m/z = 458.9 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d = 9.76 (s, 1 H),9.27 (s, 1 H), 9.09 (s, 1 H), 8.66 (br. s., 1 H), 8.26 (s, 1 H), 7.88(d, J = 8.8 Hz, 1 H), 7.35 (d, J = 8.4 Hz, 1 H), 6.90-6.52 (m, 1 H),5.87 (br. s., 2 H), 3.88 (br. s., 1 H), 1.97- 1.85 (m, 1 H), 1.05 (br.s., 1 H), carbonitrile 0.85 (d, J = 7.6 Hz, 1 H). 351 8-((3-((1S,5R,6S)-3-amino-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-4- chlorophenyl)amino)- 5-fluoro-1,7- naphthyridine-3-

MS m/z = 458.9 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d = 9.83 (br. s., 1H), 9.34 (s, 1 H), 9.17 (s, 1 H), 8.74 (br. s., 1 H), 8.33 (s, 1 H),7.96 (d, J = 8.6 Hz, 1 H), 7.42 (d, J = 8.6 Hz, 1 H), 6.97-6.58 (m, 1H), 5.95 (br. s., 2 H), 3.96 (br. s., 1 H), 2.04- 1.91 (m, 1 H), 1.13(br. s., 1 H), carbonitrile 0.93 (d, J = 7.4 Hz, 1 H). 3528-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)- 5-fluoro-1,7-naphthyridine-3-

MS m/z = 442.9 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.87-0.94 (m, 1H) 1.15- 1.21 (m, 1 H) 1.71-1.81 (m, 1 H) 3.97-4.06 (m, 1 H) 5.92 (s, 2H) 6.21 (t, J = 56.10 Hz, 1 H) 7.19 (dd, J = 11.64, 8.90 Hz, 1 H) 7.94(dt, J = 8.46, 3.59 Hz, 1 H) 8.26 (s, 1 H) 8.43 (dd, J = 7.24, 2.74 Hz,1 carbonitrile H) 9.14 (d, J = 1.96 Hz, 1 H) 9.32 (d, J = 1.96 Hz, 1 H)9.75 (s, 1 H) 353 (1R,5S,6R)-5-(5- ((7- chloropyrido[3,2- d]pyrimidin-4-yl)amino)-2- fluorophenyl)-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept-

MS m/z = 434.9 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.87-0.95 (m, 1H) 1.14- 1.21 (m, 1 H) 1.72-1.80 (m, 1 H) 3.99-4.07 (m, 1 H) 5.90 (s, 2H) 6.21 (t, J = 55.90 Hz, 1 H) 7.24 (dd, J = 11.64, 8.90 Hz, 1 H) 7.92(dt, J = 8.46, 3.50 Hz, 1 H) 8.37 (dd, J = 7.24, 2.74 Hz, 1 H) 8.403-en-3-amine (d, J = 2.35 Hz, 1 H) 8.68 (s, 1 H) 8.93 (d, J = 2.15 Hz, 1H) 10.45 (s, 1 H) 354 (1S,5R,6S)-5-(2,6- difluoro-3-((2-methoxypyrido[3,4- b]pyrazin-5- yl)amino)phenyl)- 5-(fluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 430.9 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.81-0.96 (m, 2H) 1.50- 1.64 (m, 1 H) 4.04-4.16 (m, 4 H) 4.29-4.97 (m, 2 H) 5.54 (s, 2H) 7.03-7.15 (m, 2 H) 8.21 (d, J = 5.85 Hz, 1 H) 8.33-8.46 (m, 1 H) 8.60(s, 1 H) 9.01 (d, J = 3.07 Hz, 1 H). 355 (1R,5S,6R)-5-(2,6-difluoro-3-((2- methoxypyrido[3,4- b]pyrazin-5- yl)amino)phenyl)-5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 430.9 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.82-0.97 (m, 2H) 1.51- 1.64 (m, 1 H) 4.04-4.17 (m, 4 H) 4.29-4.97 (m, 2 H) 5.54 (s, 2H) 7.02-7.16 (m, 2 H) 8.21 (d, J = 5.85 Hz, 1 H) 8.33-8.46 (m, 1 H) 8.60(s, 1 H) 9.01 (d, J = 3.22 Hz, 1 H). 356 (1R,5S,6R)-5-(3-chloro-2-fluoro-5- ((2- methoxypyrido[3,4- b]pyrazin-5-yl)amino)phenyl)- 5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 446.9 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.79-0.92 (m, 1H) 0.96- 1.06 (m, 1 H) 1.51-1.65 (m, 1 H) 4.08 (s, 4 H) 4.38-4.79 (m, 2H) 5.70 (s, 2 H) 7.13 (d, J = 5.85 Hz, 1 H) 8.17-8.26 (m, 1 H) 8.29 (d,J = 5.99 Hz, 1 H) 8.33-8.41 (m, 1 H) 8.57 (s, 1 H) 9.69 (s, 1 H). 357(1R,5S,6R)-5-(3- chloro-2-fluoro-5- ((2- isopropoxypyrido[3,4-b]pyrazin-5- yl)amino)phenyl)- 5-(fluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 474.9 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.85-0.97 (m, 1H) 1.02- 1.12 (m, 1 H) 1.48 (d, J = 6.14 Hz, 6 H) 1.58-1.72 (m, 1 H)4.08- 4.17 (m, 1 H) 4.46-4.84 (m, 2 H) 5.54 (s, 1 H) 5.76 (s, 2 H) 7.15(d, J = 5.99 Hz, 1 H) 8.28 (d, J = 6.58 Hz, 1 H) 8.34 (d, J = 5.85 Hz, 1H) 8.44 (d, J = 4.68 Hz, 1 H) 8.55 (s, 1 H) 9.73 (s, 1 H). 358(1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((2- methyl-2H-pyrazolo[3,4- c]pyridin-7- yl)amino)phenyl)- 2-oxa-4-azabicyclo[4.1.0]hept-

MS m/z = 403 [M + H]+ 1H NMR (300 MHz, CD3CN) d ppm 8.21 (s, 1 H),7.54-7.69 (m, 2 H), 7.39-7.53 (m, 1 H), 7.10- 7.26 (m, 2 H), 6.52 (t, J= 54.52 Hz, 1 H), 4.48 (td, J = 6.80, 2.78 Hz, 1 H), 4.21 (s, 3 H), 2.16(dt, J = 9.83, 7.07 Hz, 1 H), 1.63 (t, J = 7.53 Hz, 1 H), 1.30 (td, J =3-en-3-amine 9.03, 6.50 Hz, 1 H) 2,2,2- trifluoroacetate 359(1R,5S,6R)-5-(2- chloro-5-((3- chloro-1,7- naphthyridin-8-yl)amino)phenyl)- 5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 431.9 [M]+ 1H NMR (300 MHz, MeOD-d4) δ ppm 0.88-1.01 (m, 1 H)1.08- 1.18 (m, 1 H) 1.96-2.10 (m, 1 H) 3.96-4.06 (m, 1 H) 4.77-4.82 (m,1 H) 4.92-5.04 (m, 1 H) 7.08 (d, J = 5.85 Hz, 1 H) 7.40 (d, J = 8.77 Hz,1 H) 7.96 (dd, J = 8.62, 2.63 Hz, 1 H) 8.11 (d, J = 5.85 Hz, 1 H)8.23-8.30 (m, 2 H) 8.81 (d, J = 2.19 Hz, 1 H) 360 (1R,5S,6R)-5-(2-chloro-5-((3- methoxy-1,7- naphthyridin-8- yl)amino)phenyl)-5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 428.0 [M + H]+ 1H NMR (300 MHz, Solvent) δ ppm 0.93-1.01 (m, 1H) 1.13- 1.19 (m, 1 H) 1.99-2.07 (m, 1 H) 4.01 (s, 3 H) 4.02-4.08 (m, 1H) 4.83-4.84 (m, 1 H) 4.95-5.02 (m, 1 H) 7.06-7.12 (m, 1 H) 7.40 (d, J =8.62 Hz, 1 H) 7.56 (s, 1 H) 7.97 (dd, J = 8.62, 2.78 Hz, 1 H) 8.02 (d, J= 5.85 Hz, 1 H) 8.22 (d, J = 2.78 Hz, 1 H) 8.57 (d, J = 2.78 Hz, 1 H)361 (1R,5S,6R)-5-(5- ((3-chloro-5-fluoro- 1,7-naphthyridin-8-yl)amino)-2- fluorophenyl)-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 452.0 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) ppm 0.80-0.98 (m, 1 H)1.17 (br. s., 1 H) 1.66-1.86 (m, 1 H) 4.01 (t, J = 5.55 Hz, 1 H) 5.91(s, 2 H) 6.00-6.50 (m, 1 H) 7.17 (dd, J = 11 .77 , 8.84 Hz, 1 H) 7.84-8.02 (m, 1 H) 8.19 (d, J = 1.32 Hz, 1 H) 8.40 (dd, J = 7.09, 2.85 Hz, 1H) 8.59 (d, J = 2.34 Hz, 1 H) 9.01 (d, J = 2.34 Hz, 1 H) 9.61 (s, 1 H)362 (1R,5S,6R)-5-(5- ((3-chloro-1,7- naphthyridin-8- yl)amino)-2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 434.0 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) ppm 0.91 (d, J = 9.21Hz, 1 H) 1.17 (br. s., 1 H) 1.76 (d, J = 9.21 Hz, 1 H) 4.03 (t, J = 5.19Hz, 1 H) 5.90 (s, 2 H) 5.99-6.43 (m, 1 H) 7.10-7.26 (m, 2 H) 7.96-8.09(m, 1 H) 8.15 (d, J = 5.70 Hz, 1 H) 8.32 (dd, J = 7.02, 2.63 Hz, 1 H)8.51 (d, J = 2.34 Hz, 1 H) 8.90 (d, J = 2.34 Hz, 1 H) 9.61 (s, 1 H) 3638-((3-((1R,5S,6R)- 3-amino-5- (fluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)amino)- 5-fluoro-1,7-naphthyridine-3- carbonitrile

MS m/z = 441.0 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) ppm 0.84 (dt, J =9.57, 6.39 Hz, 1 H) 1.00 (td, J = 6.43, 2.63 Hz, 1 H) 1.78 (dt, J =9.46, 7.03 Hz, 1 H) 3.84-4.01 (m, 1 H) 4.70 (d, J = 2.48 Hz, 1 H) 4.87(s, 1 H) 5.69 (s, 2 H) 7.38 (d, J = 8.77 Hz, 1 H) 7.96 (dd, J = 8.70,2.70 Hz, 1 H) 8.31 (d, J = 1.02 Hz, 1 H) 8.58 (d, J = 2.63 Hz, 1 H) 9.15(d, J = 2.05 Hz, 1 H) 9.33 (d, J = 1.90 Hz, 1 H) 9.78 (s, 1 H) 364(1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((7- methoxypyrido[3,2-d]pyrimidin-4- yl)amino)phenyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 431.1 [M + H]+ 1H NMR (400 MHz, MeOH-d4) δ: 8.59-8.63 (m, 2H),8.41 (dd, J = 7.0, 2.5 Hz, 1H), 7.87-7.93 (m, 1H), 7.47 (d, J = 2.7 Hz,1H), 7.30 (dd, J = 11.7, 8.8 Hz, 1H), 6.41- 6.71 (m, 1H), 4.42 (t, J =5.3 Hz, 1H), 4.03 (s, 3H), 2.10-2.18 (m, 1H), 1.54-1.60 (m, 1H),1.19-1.28 (m, 1H) 365 (1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((2-(trifluoromethyl) pyrido[3,4-b]pyrazin- 5- yl)amino)phenyl)- 2-oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 469.1 [M + H]+ 1H NMR (400 MHz, MeOH-d4) δ: 9.21 (s, 1H), 8.38(d, J = 6.1 Hz, 1H), 8.21 (dd, J = 7.0, 2.7 Hz, 1H), 7.90-7.99 (m, 1H),7.31 (d, J = 6.1 Hz, 1H), 7.18 (dd, J = 11.6, 8.9 Hz, 1H), 6.16-6.50 (m,1H), 4.07 (t, J = 5.5 Hz, 1H), 1.88-1.96 (m, 1H), 1.36 (br. s., 1H),0.94-1.04 (m, 1H) 446 8-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)- 1,7-naphthyridine-3- carbonitrile

MS m/z = 425.1 [M + H]+ 1H NMR (MeOH) δ: 9.09 (d, J = 2.0 Hz, 1H), 8.74(d, J = 2.0 Hz, 1H), 8.63 (dd, J = 7.0, 2.5 Hz, 1H), 8.21 (d, J = 5.9Hz, 1H), 7.90 (dt, J = 8.9, 3.4 Hz, 1H), 7.29-7.37 (m, 1H), 7.23 (d, J =5.9 Hz, 1H), 6.51-6.87 (m, 1H), 4.61 (td, J = 6.7, 2.5 Hz, 1H),2.20-2.32 (m, 1H), 1.69 (t, J = 7.2 Hz, 1H), 1.30-1.44 (m, 1H) 447(1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((2- methoxypyrido[3,4b]pyrazin-5- yl)amino)phenyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 431.1 [M + H]+ 1H NMR (MeOH) δ: 8.44 (s, 1H), 8.20 (d, J = 6.1Hz, 2H), 7.89 (dt, J = 8.8, 3.4 Hz, 1H), 7.20 (dd, J = 11.7, 8.8 Hz,1H), 7.09 (d, J = 5.9 Hz, 1H), 6.21-6.61 (m, 1H), 4.22 (t, J = 5.6 Hz,1H), 4.15 (s, 3H), 1.97-2.08 (m, 1H), 1.45 (t, J = 6.7 Hz, 1H),1.06-1.14 (m, 1H) 448 (1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-4 5-fluoro-3-methoxy- 1,7-naphthyridin-8- yl)amino)phenyl)- 2-oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 448.1 [M + H]+ 1H NMR (DMSO-d6) δ: 9.39 (s, 1H), 8.71 (d, J =2.5 Hz, 1H), 8.34 (d, J = 4.9 Hz, 1H), 8.10 (s, 1H), 7.98 (d, J = 8.6Hz, 1H), 7.71 (d, J = 2.3 Hz, 1H), 7.08-7.21 (m, 1H), 6.05-6.39 (m, 1H),5.91 (s, 2H), 4.01-4.07 (m, 4H), 1.71-1.81 (m, 1H), 1.17 (br. s., 1H),0.85-0.94 (m, 1H) 449 (1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((7-(trifluoromethyl) pyrido[3,2- d]pyrimidin-4- yl)amino)phenyl)- 2-oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 469.1 [M + H]+ 1H NMR (DMSO-d6) δ: 10.62 (s, 1H), 9.22 (d, J =2.0 Hz, 1H), 8.77 (s, 1H), 8.66 (s, 1H), 8.40 (dd, J = 7.2, 2.7 Hz, 1H),7.91-7.98 (m, 1H), 7.26 (dd, J = 11.7, 8.8 Hz, 1H), 6.04-6.39 (m, 1H),5.92 (s, 2H), 3.94-4.10 (m, 1H), 1.70-1.85 (m, 1H), 1.18 (br. s., 1H),0.80- 0.99 (m, 1H)

Method I Example 366 Synthesis of8-((3-((1S,5R,6S)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)amino)-5-fluoro-1,7-naphthyridine-3-carbonitrile

A sealable vial was charged with(1S,5R,6S)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-A, 0.100 g, 0.346 mmol),chloro[2-(dicyclohexylphosphino)-3,6-dimethoxy-2′,4′,6′-triisopropyl-1,1′-biphenyl][2-(2-aminoethyl)phenyl]palladium(II)(0.025 g, 0.031 mmol),8-chloro-5-fluoro-1,7-naphthyridine-3-carbonitrile (0.080 g, 0.385mmol), and potassium bis(trimethylsilyl)amide (0.075 g, 0.376 mmol). Thevial was evacuated and backfilled with nitrogen. Dioxane (0.4 mL) wasadded and the reaction mixture was heated to 70° C. for 1 hour. Thereaction mixture was partitioned between water (40 mL), aqueoussaturated sodium bicarbonate solution (10 mL) and ethyl acetate (100mL). The organic phase was separated and was dried over magnesiumsulfate. The filtrate was concentrated under reduced pressure and theresidue was purified by reverse-phase preparative HPLC using aPhenomenex Gemini column, 10 micron, C18, 100 Å, 150×30 mm, 0.1% TFA inCH₃CN/H₂O, gradient 30% to 70% over 15 min to provide the purifiedproduct as the TFA salt. The product was partitioned between DCM and aq.10% Na₂CO₃. The layers were separated and the aqueous layer wasextracted with DCM. The combined organic extracts were washed with brineand dried over sodium sulfate. The filtrate was concentrated in vacuo toafford the title compound as the free base (0.0576 g, 0.125 mmol, 36.2%yield). MS m/z=461 [M+H]+

1H NMR (CHLOROFORM-d) Shift: 8.92 (d, J=1.9 Hz, 1H), 8.71 (br. s, 1H),8.66 (d, J=1.9 Hz, 1H), 8.20 (ddd, J=12.4, 6.9, 2.8 Hz, 1H), 8.06 (d,J=1.0 Hz, 1H), 7.34 (dt, J=5.1, 2.6 Hz, 1H), 6.23 (td, J=56.0, 0.9 Hz,1H), 3.89-3.99 (m, 1H), 1.82-1.93 (m, 1H), 1.60 (br. s., 2H), 1.40-1.48(m, 1H), 0.94-1.05 (m, 1H)

Example 367 Synthesis of8-((3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)amino)-5-fluoro-1,7-naphthyridine-3-carbonitrile

The titled compound was synthesized according to Method I, but using(1R,5S,6R)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-B). MS m/z=461 [M+H]⁺1H NMR (CHLOROFORM-d) Shift: 8.91 (d, J=1.9Hz, 1H), 8.71 (br. s, 1H), 8.65 (d, J=1.9 Hz, 1H), 8.20 (ddd, J=12.4,6.9, 2.8 Hz, 1H), 8.06 (d, J=1.0 Hz, 1H), 7.34 (dt, J=5.1, 2.6 Hz, 1H),6.23 (td, J=55.9, 1.0 Hz, 1H), 3.87-3.99 (m, 1H), 1.83-1.95 (m, 1H),1.61 (br. s., 2H), 1.41-1.48 (m, 1H), 0.94-1.05 (m, 1H)

Method K Example 368 Synthesis of(1R,5S,6R)-5-(5-((cyclobutylmethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

To a solution of(1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16g-B, 50 mg, 0.184 mmol) in 1,2-dichloroethane (1.2 mL) was addedcyclobutanecarbaldehyde (15.51 mg, 0.184 mmol) and sodiumtriacetoxyborohydride (0.033 mL, 0.221 mmol). After addition, themixture was then stirred at room temperature for 3 h. Additionalcyclobutanecarbaldehyde (15.51 mg, 0.184 mmol) was added and the mixturewas stirred at room temperature for additional 30 min. The mixture wasquenched with saturated NaHCO3 and extracted with DCM (1×6 mL). Theorganic layer was collected, dried over MgSO4, and concentrated. Theresidue was then dissolved in MeOH and solution mixture was purified bypreparative HPLC (0%-100% MeCN 0.1% TFA/H2O 0.1% TFA) to give a desiredproduct, which was dissolved in MeOH. The solution was loaded onto aPL-HCO₃ MP SPE 200 mg/6 mL column and eluted with MeOH (2×2 mL). Thecombined eluates were concentrated and dried in vacuo to give 30 mg ofthe title compound as a light yellow solid. MS m/z=340.1 [M+H]⁺

1H NMR (MeOH) δ: 6.91 (t, J=10.3 Hz, 1H), 6.64 (d, J=6.3 Hz, 1H), 6.58(d, J=7.8 Hz, 1H), 6.16-6.48 (m, 1H), 4.12 (br. s., 1H), 3.05 (d, J=7.0Hz, 2H), 2.59 (dt, J=15.0, 7.4 Hz, 1H), 2.10 (br. s., 2H), 1.85-1.99 (m,3H), 1.70-1.81 (m, 2H), 1.36 (br. s., 1H), 1.01 (q, J=7.6 Hz, 1H)

Examples 369-376 Listed in Table 4 were Synthesized According to MethodK Using the Appropriate Aniline and Aldehyde or Ketone:

TABLE 4 Example No Compound Name Compound Structure Analytical Data 369(1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((3- phenylprop-2-yn-1-yl)amino)phenyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 386.1 [M + H]+ 1H NMR (MeOH) δ: 7.35- 7.40 (m, 2H), 7.28-7.33(m, 3H), 7.05 (dd, J = 12.0, 8.7 Hz, 1H), 6.78-6.87 (m, 2H), 6.24- 6.55(m, 1H), 4.17-4.22 (m, 1H), 4.14 (s, 2H), 1.94-2.03 (m, 1H), 1.43 (t, J= 6.9 Hz, 1H), 1.05-1.13 (m, 1H) 370 (1R,5S,6R)-5-(5-(((1- (4-chlorophenyl)cyclo- propyl)methyl)amino)- 2-fluorophenyl)-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 436.1 [M + H]+ 1H NMR (MeOH) δ: 7.33- 7.38 (m, 2H), 7.25-7.29(m, 2H), 6.88 (dd, J = 11.9, 8.8 Hz, 1H), 6.65 (dd, J = 6.7, 2.9 Hz,1H), 6.54 (dt, J = 8.9, 3.4 Hz, 1H), 6.13-6.44 (m, 1H), 4.07 (br. s.,1H), 3.30 (d, J = 9.2 Hz, 2H), 1.81-1.90 (m, 1H), 1.33 (d, J = 4.3 Hz,1H), 0.92-1.04 (m, 3H), 0.84-0.90 (m, 2H) 371 (1R,5S,6R)-5-(difluoromethyl)-5- (2-fluoro-5- ((((1(S,R),2(S,R))-2-phenylcyclopropyl) methyl)amino)phenyl)- 2-oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine

MS m/z = 402 [M + H]+ 1H NMR (MeOH) δ: 7.20- 7.28 (m, 2H), 7.05-7.17 (m,4H), 6.45-6.83 (m, 3H), 4.58 (dt, J = 6.7, 3.6 Hz, 1H), 3.17 (dt, J =6.3, 3.0 Hz, 2H), 2.19 (dt, J = 9.8, 7.0 Hz, 1H), 1.84- 1.92 (m, 1H),1.60-1.68 (m, 1H), 1.38-1.47 (m, 1H), 1.31- 1.38 (m, 1H), 0.95-1.02 (m,2H) 372 (1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-((((l(S,R),2(R,S))-2- phenylcyclopropyl) methyl)amino)phenyl)- 2-oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 402 [M + H]+ 1H NMR (MeOH) δ: 7.17- 7.33 (m, 5H), 6.98 (dd, J =12.1, 9.0 Hz, 1H), 6.37- 6.69 (m, 3H), 4.49 (br. s., 1H), 2.70-2.83 (m,2H), 2.29- 2.36 (m, 1H), 2.05-2.14 (m, 1H), 1.58 (br. s., 1H), 1.45-1.53 (m, 1H), 1.24-1.32 (m, 1H), 1.08-1.15 (m, 1H), 0.95 (q, J = 5.7 Hz,1H) 373 (1R,5S,6R)-5-(5-(((4- chloro-1- (difluoromethyl)-1H- pyrazol-3-yl)methyl)amino)-2- fluorophenyl)-5- (fluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 418 [M + H]+ (300 MHz, CHLOROFORM- d) d: 0.86 (m, 1 H), 1.18(m, 1 H), 1.71 (m, 1 H), 3.88 (m, 1 H), 4.20 (m, 1 H), 4.31 (d, J = 5.7Hz, 2 H), 4.60 (dd, J = 47.1, 10.2 Hz, 1 H), 4.69 (dd, J = 49.1, 10.2Hz, 1 H), 6.59 (dt, J = 8.7, 3.4, 3.4 Hz, 1 H), 6.83 (dd, J = 6.7, 2.9Hz, 1 H), 6.91 (dd, J = 11.7, 8.7 Hz, 1 H), 7.09 (t, J = 60.5 Hz, 1 H),7.78 (s, 1 H). 374 (1R,5R,6R)-5-(5-(((4- chloro-1- (difluoromethyl)-1H-pyrazol-3- yl)methyl)amino)-2- fluorophenyl)-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 435.8 [M + H]+(300 MHz, CHOROFORM-d) d: 0.90 (m, 1 H), 1.36 (m,1 H), 1.80 (m, 1 H), 3.87 (m, 1 H), 4.21 (br, 1 H), 4.30 (d, J = 5.7 Hz,2 H), 6.21 (t, J = 55.8 Hz, 1 H), 6.62 (m, 1 H), 6.84 (dd, J = 6.5, 2.9Hz, 1 H), 6.92 (dd, J = 11.7, 8.6 Hz, 1 H), 7.09 (t, J = 60.5 Hz, 1 H),7.78 (s, 1 H). 375 (1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-(((3-methylenecyclobutyl) methyl)amino)phenyl)- 2-oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 352.1 [M + H]+ 1H NMR (400 MHz, MeOH- d4) δ: 6.92 (dd, J =12.0, 8.7 Hz, 1H), 6.71 (dd, J = 6.5, 2.9 Hz, 1H), 6.60 (dt, J = 8.8,3.4 Hz, 1H), 6.13-6.44 (m, 1H), 4.77 (t, J = 2.3 Hz, 2H), 4.01- 4.07 (m,1H), 3.14 (d, J = 7.2 Hz, 2H), 2.79-2.88 (m, 2H), 2.53-2.64 (m, 1H),2.40-2.48 (m, 2H), 1.82-1.91 (m, 1H), 1.30-1.36 (m, 1H), 0.96 (dt, J =9.2, 6.7 Hz, 1H) 376 (1R,5S,6R)-5- (difluoromethyl)-5- (2-fluoro-5-(((1-(trifluoromethyl)cyclo- propyl)methyl)amino) phenyl)-2-oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 394.1 [M + H]+ 1H NMR (400 MHz, MeOH- d4) δ: 6.93 (dd, J =11.9, 8.8 Hz, 1H), 6.71 (dd, J = 6.6, 3.0 Hz, 1H), 6.58 (dt, J = 8.7,3.4 Hz, 1H), 6.10-6.41 (m, 1H), 3.97-4.03 (m, 1H), 1.80-1.87 (m, 1H),1.30 (t, J = 6.4 Hz, 1H), 0.91-0.99 (m, 3H), 0.81 (br. s., 2H)

Method L Example 377 Synthesis of(1R,5S,6R)-5-(5-4(5-chloropyridin-2-yl)methyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

To a solution of tert-butyl((1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(16i-B, 0.072 g, 0.194 mmol) and 5-chloropicolinaldehyde (0.028 g, 0.198mmol) in DCE (1 mL) at RT was added HOAc (0.011 ml, 0.194 mmol) andsodium triacetoxyborohydride (0.050 g, 0.236 mmol). The reaction mixturewas stirred at RT for 1.5 h. Trifluoroacetic acid (2.0 ml, 26.9 mmol)was added and after 15 min, and the reaction mixture was diluted withEtOAc and water. The pH was adjusted to 9 with 10 M NaOH. The aqueousphase was extracted with EtOAc and the combined organic extracts werewashed with brine and dried over MgSO₄. The filtrate was concentratedunder reduced pressure and the residue was purified by flash columnchromatography on silica gel (60% to 100% EtOAc in heptane) to give thetitle compound (0.064 g, 0.161 mmol, 83% yield) as a white solid.

MS m/z=397.1 [M+H]+

1H NMR (400 MHz, CDCl3) δ 0.83-0.92 (m, 1H), 1.39 (t, J=6.85 Hz, 1H),1.66-1.89 (m, 1H), 3.79-3.87 (m, 1H), 4.24 (d, J=4.50 Hz, 2H), 4.63 (brs, 1H), 4.99 (br s, 2H), 6.23 (t, J=56.1 Hz, 1H), 6.41 (dt, J=8.51, 3.37Hz, 1H), 6.77-6.87 (m, 2H), 7.14 (d, J=8.41 Hz, 1H), 7.56 (dd, J=8.41,2.35 Hz, 1H), 8.48 (d, J=2.35 Hz, 1H)

Examples 378-385 listed in Table 5 were synthesized according to MethodL using the appropriate Boc-protected aniline and aldehyde or ketone:

TABLE 5 Example No Compound Name Compound Structure Analytical Data 378(1R,5S,6R)-5-(5-(((R)- 1-(5-chloropyridin-2- yl)ethyl)amino)-2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine and (1R,5S,6R)-5-(5-(((S)- 1-(5-chloropyridin-2-yl)ethyl)amino)-2- fluorophenyl)-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 411 [M + H]+ 1H NMR (400 MHz, CDCl3) δ 0.86-0.95 (m, 1H),1.31-1.41 (m, 1H), 1.44-1.49 (m, 3H), 1.72-1.82 (m, 1H), 3.78-3.89 (m,1H), 4.31 (br s, 1H), 4.43- 4.54 (m, 1H), 4.69 (s br, 2H), 6.19 (t, J =56.14 Hz, 1H), 6.30-6.38 (m, 1H), 6.64-6.74 (m, 1H), 6.81 (ddd, J =11.74, 8.61, 3.33 Hz, 1H), 7.24-7.28 (m, 1H), 7.56 (ddd, J = 8.61, 6.46,2.54 Hz, 1H), 8.50 (dd, J = 7.92, 2.05 Hz, 1H) 379 (1R,5S,6R)-5-(5-((cyclopropylmethyl) amino)-2- fluorophenyl)-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 326[M + H]+ 1H NMR (400 MHz, CDCl3) δ 0.15-0.23 (m, 2H),0.48-0.55 (m, 2H), 0.84-0.95 (m, 1H), 0.97-1.09 (m, 1H), 1.37 (t, J =6.26 Hz, 1H), 1.76-1.86 (m, 1H), 2.87 (d, J = 6.85 Hz, 2H), 3.70 (s br,1H), 3.84-3.88 (m, 1H), 4.52 (s br, 2H), 6.22 (t, J = 56.10 Hz, 1H),6.47 (dt, J = 8.61, 3.42 Hz, 1H), 6.72 (dd, J = 6.46, 2.93 Hz, 1H), 6.90(dd, J = 11.74, 8.80 Hz, 1H) 380 (1R,5S,6R)-5-(5-(((R)-3-bromo-6,7-dihydro- 5H- cyclopenta[b]pyridin- 7-yl)amino)-2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine or (1R,5S,6R)-5-(5-(((S)- 3-bromo-6,7-dihydro- 5H-cyclopenta[b]pyridin- 7-yl)amino)-2- fluorophenyl)-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 467.0 [M + H]+. ¹H NMR (400 MHz, CDCl₃) δ 0.87-0.94 (m, 1H),1.38 (t, J = 6.70 Hz, 1H), 1.77-1.83 (m, 1H), 1.89-1.98 (m, 1H), 2.71-2.81 (m, 1H), 2.85-2.93 (m, 2H), 3.87 (t, J = 5.48 Hz, 1H), 4.40 (br s,1H), 4.48 (s br, 2H), 4.62-4.68 (m, 1H), 6.24 (t, J = 55.90 Hz, 1H),6.64 (dt, J = 8.61, 3.10 Hz, 1H), 6.88 (dd, J = 6.46, 2.93 Hz, 1H), 6.93(dd, J = 11.54, 8.61 Hz, 1H), 7.68 (s, 1H), 8.47 (s, 1H). or ¹H NMR (400MHz, CDCl₃) δ 0.85-0.94 (m, 1H), 1.38 (t, J = 6.75 Hz, 1H), 1.72-1.93(m, 2H), 2.72-2.97 (m, 3H), 3.83- 3.88 (m, 1H), 4.41 (s br, 1H),4.52-4.73 (m, 3H), 6.24 (t, J = 55.80 Hz, 1H), 6.61 (dt, J = 8.61, 3.42Hz, 1H), 6.82 (dd, J = 6.46, 2.93 Hz, 1H), 6.89 (dd, J = 11.54, 8.61 Hz,1H), 7.68 (s, 1H), 8.49 (s, 1H). 381 (1R,5S,6R)-5-(5-(((S)-3-bromo-6,7-dihydro- 5H- cyclopenta[b]pyridin- 7-yl)amino)-2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine or (1R,5S,6R)-5-(5-(((R)- 3-bromo-6,7-dihydro- 5H-cyclopenta[b]pyridin- 7-yl)amino)-2- fluorophenyl)-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 467.0 [M + H]+. ¹H NMR (400 MHz, CDCl₃) δ 0.85-0.94 (m, 1H),1.38 (t, J = 6.75 Hz, 1H), 1.72-1.93 (m, 2H), 2.72-2.97 (m, 3H), 3.83-3.88 (m, 1H), 4.41 (s br, 1H), 4.52-4.73 (m, 3H), 6.24 (t, J = 55.80 Hz,1H), 6.61 (dt, J = 8.61, 3.42 Hz, 1H), 6.82 (dd, J = 6.46, 2.93 Hz, 1H),6.89 (dd, J = 11.54, 8.61 Hz, 1H), 7.68 (s, 1H), 8.49 (s, 1H). or ¹H NMR(400 MHz, CDCl₃) δ 0.87-0.94 (m, 1H), 1.38 (t, J = 6.70 Hz, 1H),1.77-1.83 (m, 1H), 1.89-1.98 (m, 1H), 2.71- 2.81 (m, 1H), 2.85-2.93 (m,2H), 3.87 (t, J = 5.48 Hz, 1H), 4.40 (br s, 1H), 4.48 (s br, 2H),4.62-4.68 (m, 1H), 6.24 (t, J = 55.90 Hz, 1H), 6.64 (dt, J = 8.61, 3.10Hz, 1H), 6.88 (dd, J = 6.46, 2.93 Hz, 1H), 6.93 (dd, J = 11.54, 8.61 Hz,1H), 7.68 (s, 1H), 8.47 (s, 1H). 382 (1R,5S,6R)-5-(5-(((R)-3-bromo-5,6,7,8- tetrahydroquinolin-8- yl)amino)-2- fluorophenyl)-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-3-amine and(1R,5S,6R)-5-(5-(((S)- 3-bromo-5,6,7,8- tetrahydroquinolin-8-yl)amino)-2- fluorophenyl)-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 483.0 [M + H]+. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.90 (dd,J = 16.24, 8.61 Hz, 1 H) 1.37 (t, J = 7.20 Hz, 1 H) 1.72-1.97 (m, 4 H)2.20- 2.36 (m, 1 H) 2.72-2.87 (m, 2 H) 3.86 (t, J = 5.38 Hz, 1 H)4.24-4.43 (m, 3 H) 4.61-4.81 (m, 1 H) 6.24 (t, J = 56.50 Hz, 1 H)6.60-6.69 (m, 1 H) 6.78- 6.96 (m, 2 H) 7.58 (s, 1 H) 8.46-8.49 (m, 1 H)383 (R)-4-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)chroman-7-carbonitrile and (S)-4-((3- ((1R,5S,6R)-3-amino-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)amino) chroman-7-carbonitrile

MS m/z = 429.0 [M + H]+. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.88-0.98(m, 1 H) 1.37 (br. s., 1 H) 1.76-1.86 (m, 1 H) 2.08-2.18 (m, 2 H) 3.80(d, J = 7.24 Hz, 1 H) 3.89 (t, J = 6.75 Hz, 1 H) 4.17-4.36 (m, 4 H)4.53-4.63 (m, 1 H) 6.22 (t, J = 57.10 Hz, 1 H) 6.55-6.61 (m, 1 H) 6.79(td, J = 5.97, 3.13 Hz, 1 H) 6.96 (dd, J = 11.54, 8.80 Hz, 1 H) 7.13 (s,1 H) 7.16 (d, J = 8.02 Hz, 1 H) 7.41 (d, J = 7.82 Hz, 1 H) 384(1R,5S,6R)-5-(5-(((R)- 5-bromo-2,3-dihydro- 1H-inden-1-yl)amino)-2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-3-amine and (1R,5S,6R)-5-(5-(((S)- 5-bromo-2,3-dihydro-1H-inden-1-yl)amino)- 2-fluorophenyl)-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-3-amine

MS m/z = 467.0 [M + H]+. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.85-0.98(m, 1 H) 1.34- 1.41 (m, 1 H) 1.77-1.95 (m, 2 H) 2.53 (d, J = 7.24 Hz, 1H) 2.80-2.90 (m, 1 H) 2.93- 3.03 (m, 1 H) 3.76 (br. s., 1 H) 3.84-3.92(m, 1 H) 4.35 (br. s., 2 H) 4.83-4.91 (m, 1 H) 6.22 (t, J = 56.30 Hz, 1H) 6.54- 6.61 (m, 1 H) 6.79 (td, J = 6.70, 3.10 Hz, 1 H) 6.92 (dd, J =11.74, 8.61 Hz, 1 H) 7.20 (d, J = 7.82 Hz, 1 H) 7.31 (br. s., 1 H) 7.39(s, 1 H) 385 N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-6- chlorofuro[3,2-b]pyridin-3-amine

MS m/z = 423 [M + H]+. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.93 (dd, J= 15.06, 6.85 Hz, 1 H) 1.42 (t, J = 6.10 Hz, 1 H) 1.83 (dd, J = 16.43,7.24 Hz, 1 H) 3.89 (t, J = 7.20 Hz, 1 H) 4.64-4.85 (m, 2 H) 6.16 (s,1H), 6.25 (t, J = 55.90 Hz, 1 H) 6.78-6.84 (m, 1 H) 6.99 (dd, J = 11.44,8.70 Hz, 1 H) 7.17 (dd, J = 6.46, 2.93 Hz, 1 H) 7.66 (d, J = 1.76 Hz, 1H) 7.87 (s, 1 H) 8.44-8.47 (m, 1 H)

Method M Example 386 Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-cyano-3-(methoxymethyl)picolinamide

A microwave vial was charged withN-(3-((1R,5S,6R)-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-chlorophenyl)-5-chloro-3-(methoxymethyl)picolinamide(Example 128, 0.139 g, 0.307 mmol), tris (dibenzylideneacetone)dipalladium (0) (0.028 g, 0.031 mmol),2-dicyclohexylphosphino-2′,6′-dimethoxy-1′1′-biphenyl (0.025 g, 0.061mmol), and zinc cyanide (0.023 ml, 0.368 mmol). The vial was evacuatedand backfilled with N₂ gas. A solvent mixture of 99:1 DMF: water (1.5mL) was added and the reaction mixture was heated to 120° C. for 20minutes in the microwave. The reaction mixture was cooled to rt anddiluted with water and EtOAc. The organic layer was separated andsequentially washed with water, 1M LiCl (aq), and brine before dryingover magnesium sulfate. The filtrate was concentrated under reducedpressure. The residue was triturated with DCM:ether˜1:1 to afford awhite solid which was collected by filtration, dried under high vacuumand identified as the title compound (0.0931 g, 0.210 mmol, 68.4%yield). MS m/z=443.9 [M+H]⁺

1H NMR (400 MHz, DMSO-d6) δ ppm 0.88 (dt, J=9.63, 6.33 Hz, 1H) 0.96 (td,J=6.50, 2.64 Hz, 1H) 1.69 (dt, J=9.88, 7.09 Hz, 1H) 3.42 (s, 3H)3.94-4.01 (m, 1H) 4.63-4.72 (m, 1H) 4.75-4.84 (m, 1H) 4.86 (s, 2H) 5.62(s, 2H) 7.45 (d, J=8.61 Hz, 1H) 7.86 (dd, J=8.61, 2.54 Hz, 1H) 8.05 (d,J=2.54 Hz, 1H 8.45-8.52 (m, 1H) 9.11 (d, J=1.96 Hz, 1H) 10.85 (s, 1H)

Table 6 includes compound examples prepared wherein the appropriatehalogenated intermediate (also a compound example) was converted intothe corresponding cyano-compound (Examples 387-400 in Table 6) accordingto Method M:

TABLE 6 Example No Compound Name Compound Structure Analytical Data 387N-(3-((1R,5S,6R)-3- amino-5- (fluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5- cyano-3-(hydroxymethyl) picolinamide

MS m/z = 430 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.77-1.00 (m, 2 H)1.61- 1.75 (m, 1 H) 3.89-4.00 (m, 1 H) 4.55-4.71 (m, 1 H) 4.74- 4.86 (m,1 H) 4.92 (s, 2 H) 5.60 (s, 2 H) 7.43 (d, J = 8.48 Hz, 1 H) 7.85 (d, J =8.77 Hz, 1 H) 8.05 (s, 1 H) 8.54 (s, 1 H) 9.06 (s, 1 H) 10.84 (br. s., 1H) 388 N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- cyano-3-fluoropicolinamide

MS m/z = 419.9 [M]+ 1H NMR (300 MHz, DMSO-d6) δ 0.82-0.98 (m, 1 H) 1.14(br. s., 1 H) 1.62-1.79 (m, 1 H) 3.92- 4.05 (m, 1 H) 5.88 (s, 2 H) 5.98-6.40 (m, 1 H) 7.08-7.39 (m, 1 H) 7.70-8.02 (m, 2 H) 8.66 (d, J = 10.23Hz, 1 H) 9.04 (s, 1 H) 10.88 (s, 1 H) 389 N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)-5- cyano-3- (dimethylamino) picolinamide

MS m/z = 445 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.90 (d, J = 5.99Hz, 1 H) 1.13-1.27 (m, 1 H) 1.70 (d, J = 4.53 Hz, 1 H) 2.92 (br. s., 6H) 3.98 (br. s., 1 H) 5.87 (br. s., 2 H) 5.97-6.46 (m, 1 H) 7.19- 7.34(m, 1 H) 7.72-7.90 (m, 3 H) 8.35 (br. s., 1 H) 10.72 (br. s., 1 H) 390N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluoro-5- methylphenyl)-5-cyanopicolinamide

MS m/z = 416 [M + H]+ 1H NMR (300 MHz, DMSO-d6) δ ppm 0.82-1.01 (m, 1 H)1.14 (br. s., 1 H) 1.71 (q, J = 7.70 Hz, 1 H) 2.26 (s, 3 H) 4.01 (br.s., 1 H) 5.83 (s, 2 H) 6.00-6.48 (m, 1 H) 7.82 (t, J = 6.87 Hz, 2 H)8.27 (d, J = 8.18 Hz, 1 H) 8.58 (d, J = 7.89 Hz, 1 H) 9.19 (s, 1 H)10.73 (s, 1 H) 391 N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- cyano-3-(methoxymethyl) picolinamide

MS m/z = 446 [M + H]+ 1H NMR (300 MHz, CHLOROFORM-d) d ppm 9.84 (s, 1H), 8.56 (s, 1 H), 8.50 (s, 1 H), 7.82-7.98 (m, 1 H), 7.50 (dd, J =6.50, 2.12 Hz, 1 H), 6.91- 7.04 (m, 1 H), 6.03-6.46 (m, 1 H), 4.97-5.28(m, 4 H), 3.91 (t, J = 5.70 Hz, 1 H), 3.56 (s, 3 H), 1.81-1.96 (m, 1 H),1.38-1.55 (m, 1 H), 0.92-1.05 (m, 1 H). 392 8-((3-((1R,5S,6R)-3-amino-5- (fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluorophenyl)amino)- 1,7-naphthyridine- 3-carbonitrile

MS m/z = 407.2 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 9.72 (s, 1 H),9.21 (d, J = 1.76 Hz, 1 H), 8.87-9.06 (m, 1 H), 8.25 (dd, J = 7.34, 2.64Hz, 1 H), 8.22 (d, J = 5.87 Hz, 1 H), 8.02 (dt, J = 8.56, 3.55 Hz, 1 H),7.22 (d, J = 5.67 Hz, 1H), 7.16 (dd, J = 8.80, 11.74 Hz, 1H), 5.75 (s, 2H), 4.39-4.75 (m, 2 H), 3.90-4.10 (m, 1 H), 1.49-1.69 (m, 1 H), 1.03 (d,J = 1.96 Hz, 1 H), 0.83 (dt, J = 9.24, 6.33 Hz, 1 H). 3934-((3-((1R,5S,6R)-3- amino-5- (fluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino) pyrido[3,2-d]pyrimidine-7- carbonitrile

MS m/z = 408 [M + H]+ 1H NMR (400 MHz, DMSO-d6) d ppm 10.58 (s, 1 H),9.24 (d, J = 1.76 Hz, 1 H), 8.87 (d, J = 1.96 Hz, 1 H), 8.74 (s, 1 H),8.29 (dd, J = 7.43, 2.74 Hz, 1 H), 7.84-7.95 (m, 1 H), 7.22 (dd, J =11.74, 8.80 Hz, 1 H), 5.69 (br. s., 2 H), 4.44-4.76 (m, 2 H), 4.03 (t, J= 5.28 Hz, 1 H), 1.54-1.69 (m, 1 H), 0.97-1.08 (m, 1 H), 0.78- 0.89 (m,1 H). 394 N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- cyano-3-isopropylpicolinamide

MS m/z = 444 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) ppm 0.83-0.98 (m, 1 H)1.09- 1.17 (m, 1 H) 1.25 (d, J = 6.87 Hz, 6 H) 1.63-1.82 (m, 1 H) 3.40(quin, J = 6.83 Hz, 1 H) 3.92- 4.03 (m, 1 H) 5.88 (s, 2 H) 5.97- 6.56(m, 1 H) 7.23 (dd, J = 11.77, 8.84 Hz, 1 H) 7.70- 7.90 (m, 2 H) 8.53 (d,J = 1.90 Hz, 1 H) 8.95 (d, J = 1.90 Hz, 1 H) 10.78 (s, 1 H) 395N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- cyano-3-(difluoromethyl) picolinamide

MS m/z = 452.1 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.77-0.96 (m, 4H) 1.07- 1.54 (m, 12 H) 1.73 (d, J = 9.50 Hz, 2 H) 4.00 (br. s., 1 H)5.74- 5.93 (m, 2 H) 5.96-6.42 (m, 1 H) 7.14-7.31 (m, 1 H) 7.49- 8.00 (m,3 H) 8.78-8.96 (m, 1 H) 9.28-9.42 (m, 1 H) 10.94- 11.09 (m, 1 H) 396N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)-5- cyano-3-(hydroxymethyl) picolinamide

MS m/z = 432 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.85-0.99 (m, 1 H)1.09- 1.22 (m, 1 H) 1.64-1.80 (m, 1 H) 3.17 (d, J = 5.26 Hz, 1 H) 3.94-4.05 (m, 1 H) 4.83-4.99 (m, 2 H) 5.52-5.65 (m, 1 H) 5.80- 5.91 (m, 2 H)5.96-6.42 (m, 1 H) 7.13-7.29 (m, 1 H) 7.74- 7.97 (m, 2 H) 8.47-8.64 (m,1 H) 8.99-9.12 (m, 1 H) 10.72- 10.88 (m, 1 H) 397 N-(3-((1R,5S,6R)-3-amino-5- (fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5- cyano-3- methoxypicolinamide

MS m/z = 430.1 [M + H]+ 1H NMR (300 MHz, DMSO) Shift = 10.73 (s, 1H),8.67 (d, J = 1.6 Hz, 1H), 8.22 (d, J = 1.5 Hz, 1H), 7.91 (d, J = 2.5 Hz,1H), 7.81 (dd, J = 2.5, 8.6 Hz, 1H), 7.42 (d, J = 8.6 Hz, 1H), 5.60 (s,2H), 4.87-4.73 (m, 1H), 4.70- 4.59 (m, 1H), 3.99-3.80 (m, 4H), 1.67 (td,J = 6.9, 9.7 Hz, 1H), 0.94 (dt, J = 2.8, 6.6 Hz, 1H), 0.85 (td, J = 6.3,9.6 Hz, 1H) 398 N-(3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluoro-5- methylphenyl)-5- cyano-3-fluoropicolinamide

MS m/z = 434.0 [M + H]+ 1H NMR (300 MHz, DMSO) Shift = 10.79 (s, 1H),9.09-8.97 (m, 1H), 8.66 (dd, J = 1.5, 10.2 Hz, 1H), 7.75 (dd, J = 2.6,6.2 Hz, 1H), 7.65 (dd, J = 2.7, 6.4 Hz, 1H), 6.44-5.99 (m, 1H), 5.86 (s,2H), 4.03-3.94 (m, 1H), 2.27 (d, J = 2.2 Hz, 3H), 1.76-1.64 (m, 1H),1.17-1.07 (m, 1H), 0.96-0.84 (m, 1H) 399 N-(3-((1R,5S,6R)-3- amino-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-fluoro-5- methylphenyl)-5- cyano-3- methoxypicolinamide

MS m/z = 446.1 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.80-0.95 (m, 1H) 1.04- 1.15 (m, 1 H) 1.62-1.75 (m, 1 H) 2.26 (s, 3 H) 3.91 (s, 3 H)3.93-4.01 (m, 1 H) 5.85 (s, 2 H) 6.00-6.52 (m, 1 H) 7.53 (d, J = 4.97Hz, 1 H) 7.74 (d, J = 4.68 Hz, 1 H) 8.20 (s, 1 H) 8.66 (s, 1 H) 10.58(s, 1 H) 400 4-((3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino) pyrido[3,2-d]pyrimidine-7- carbonitrile

MS m/z = 425.9 [M + H]+ 1H NMR (400 MHz, DMSO-d6) δ ppm 0.91 (dt, J =9.19, 6.55 Hz, 1 H) 1.18 (t, J = 7.14 Hz, 1 H) 1.73-1.80 (m, 1 H)4.00-4.06 (m, 1 H) 5.91 (s, 2 H) 6.21 (t, J = 56.10 Hz, 1 H) 7.26 (dd, J= 11.74, 8.80 Hz, 1 H) 7.93 (ddd, J = 8.80, 3.91, 2.93 Hz, 1 H) 8.39(dd, J = 4.31 Hz, 1 H) 8.75 (s, 1 H) 8.88 (d, J = 1.96 Hz, 1 H) 9.24 (d,J = 1.96 Hz, 1 H) 10.61 (s, 1 H) 450 N-(3-((1R,5S,6R)-3- amino-5-(fluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4-chlorophenyl)-5- cyano-3- fluoropicolinamide

M S m/z = 418.1 [M + H]+ 1H NMR (300 MHz, DMSO) δ = 10.95 (s, 1H), 9.05(s, 1H), 8.68 (dd, J = 1.5, 10.2 Hz, 1H), 8.02 (d, J = 2.5 Hz, 1H), 7.82(dd, J = 2.6, 8.7 Hz, 1H), 7.45 (d, J = 8.6 Hz, 1H), 5.64 (s, 2H), 4.80(s, 1H), 4.65 (s, 1H), 4.01-3.90 (m, 1H), 1.66 (td, J = 6.9, 9.8 Hz,1H), 0.94 (dt, J = 2.7, 6.5 Hz, 1H), 0.85 (td, J = 6.2, 9.5 Hz, 1H)

Method N Example 401 Synthesis of(R)-7-((3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)amino)-6,7-dihydro-5H-cyclopenta[b]pyridine-3-carbonitrile

A sealable vial was charged with a mixture of potassium ferrocyanidetrihydrate (0.056 g, 0.13 mmol),chloro(2-dicyclohexylphosphino-2′,4′,6′-triisopropyl-1,1′-biphenyl)[2-(2′-amino-1,1′-biphenyl)]palladium(II)(0.010 g, 0.013 mmol),2-(dicyclohexylphosphino)-2′,4′,6′,-tri-isopropyl-1,1′-biphenyl (0.0069g, 0.014 mmol), and(1R,5S,6R)-5-(5-(((R)-3-bromo-6,7-dihydro-5H-cyclopenta[b]pyridin-7-yl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(Example 351, 0.115 g, 0.246 mmol). Dioxane (0.65 mL) was added,followed by 0.65 mL of a solution of 30 mg of KOAc in 6.5 mL of water.The reaction mixture was purged with Nitrogen for 5 min. The reactionmixture was heated to 80° C. for 18 h, heated to 100° C. for 2 h andthen cooled to room temperature. The reaction mixture was diluted withEtOAc, brine, and water. The aqueous phase was extracted with EtOAc (2×)and the combined organic extracts were washed with brine and dried overMgSO₄. The filtrate was concentrated under reduced pressure. The residuewas purified by flash column chromatography on silica gel (20% to 80%EtOAc in DCM) to give the title compound (0.074 g, 0.18 mmol, 73% yield)as a pale yellow solid.

MS m/z=414.0 [M+H]⁺. Calculated for C₂₁H₁₈F₃N₅O 413.1.

¹H NMR (400 MHz, CDCl₃) δ 0.88-0.94 (m, 1H), 1.38 (t, J=6.80 Hz, 1H),1.76-1.83 (m, 1H), 1.89-2.00 (m, 1H), 2.77-2.99 (m, 3H), 3.84-3.90 (m,1H), 4.43 (d br, J=3.33 Hz, 1H), 4.54 (br s, 2H), 4.74 (td, J=8.00, 2.93Hz, 1H), 6.24 (t, J=55.90 Hz, 1H), 6.65 (dt, J=8.61, 3.50 Hz, 1H),6.89-6.98 (m, 2H), 7.79 (s, 1H), 8.70 (s, 1H).

The relative stereochemistry at the benzylic carbon was not determined.The compound may have either R or S stereochemistry at the benzyliccarbon. It was isolated as a single diastereomer.

Table 7 includes compound examples prepared wherein the appropriatehalogenated intermediate (also a compound example) was converted intothe corresponding cyano-compound (Examples 402-404) according to MethodN

TABLE 7 Example No Compound Name Compound Structure Analytical Data 402(S)-7-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)-6,7-dihydro-5H- cyclopenta[b]pyridine- 3-carbonitrile (Example 365)

MS m/z = 414.0 [M + H]+. ¹H NMR (400 MHz, CDCl₃) δ 0.86-0.94 (m, 1H),1.39 (t, J = 6.70 Hz, 1H), 1.74-1.82 (m, 1H), 1.83-1.96 (m, 1H), 2.76-3.05 (m, 3H), 3.83-3.90 (m, 1H), 4.45 (d br, J = 3.52 Hz, 1H), 4.60-4.82(m, 3H), 6.24 (t, J = 55.80 Hz, 1H), 6.60 (dt, J = 8.66, 3.30 Hz, 1H),6.83 (dd, J = 6.46, 2.93 Hz, 1H), 6.88 (dd, J = 11.54, 8.80 Hz, 1H),7.79 (s, 1H), 8.72 (s, 1 H). The relative stereochemistry at thebenzylic carbon was not determined The compound may have either R or Sstereochemistry at the benzylic carbon. It was isolated as a singlediastereomer. 403 (R)-8-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)-5,6,7,8- tetrahydroquinoline-3- carbonitrile and (S)-8-((3-((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)- 5,6,7,8-tetrahydroquinoline-3- carbonitrile

MS m/z = 428.1 [M + H]+. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.91 (dd,J = 15.85, 8.61 Hz, 1 H) 1.37 (br. s., 1 H) 1.75-2.00 (m, 4 H) 2.30-2.43(m, 1 H) 2.77-2.93 (m, 2 H) 3.87 (t, J = 5.58 Hz, 1 H) 4.26-4.50 (m, 3H) 4.78 (br. s., 1 H) 6.24 (t, J = 56.30 Hz, 1 H) 6.62- 6.70 (m, 1 H)6.79-6.97 (m, 2 H) 7.70 (s, 1 H) 8.68 (d, J = 6.06 Hz, 1 H) 404(R)-1-((3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- fluorophenyl)amino)-2,3-dihydro-1H- indene-5-carbonitrile and (S)-1-((3-((1R,5S,6R)-3-amino- 5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0]hept-3-en-5-yl)-4- fluorophenyl)amino)- 2,3-dihydro-1H- indene-5-carbonitrile

MS m/z = 413.1 [M + H]+. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.88-0.95(m, 1 H) 1.33-1.41 (m, 1 H) 1.77-1.95 (m, 2 H) 2.61 (d, J = 6.65 Hz, 1H) 2.82- 2.94 (m, 1 H) 2.96-3.06 (m, 1 H) 3.72-3.92 (m, 2 H) 4.43 (br.s., 2 H) 4.95 (br. s., 1 H) 6.21 (t, J = 56.10 Hz, 1 H) 6.54- 6.60 (m, 1H) 6.81 (dd, J = 6.36, 3.03 Hz, 1 H) 6.92 (dd, J = 11.54, 8.61 Hz, 1 H)7.37- 7.45 (m, 1 H) 7.46-7.56 (m, 2 H)

Method O Example 405 Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(cyclopropylethynyl)picolinamide

A sealable vial was evacuated and backfilled with nitrogen and thencharged under a positive pressure of nitrogen withN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropicolinamide(Example 76, 200 mg, 0.487 mmol),2-(dicyclohexylphosphino)-2′,4′,6′,-tri-isopropyl-1,1′-biphenyl (69.6mg, 0.146 mmol) bis(acetonitrile)palladium(II) dichloride (12.63 mg,0.049 mmol) and cesium carbonate (555 mg, 1.704 mmol), followed byanhydrous MeCN (1.5 mL). The suspension was stirred for 25 min. Thencyclopropylacetylene (0.083 mL, 0.974 mmol) was added and the reactionmixture was heated to 90° C. for 1.5 h. The reaction mixture was cooledto rt and partitioned between water and EtOAc. The organic extract waswashed with brine and dried over MgSO4. The filtrate was concentrated invacuo to give the crude material which was treated with MeOH. A solidprecipitated which was filtered off and discarded. The filtrate wasabsorbed onto a plug of silica gel and purified by silica gel flashchromatography, eluting with a gradient of 15% to 90% EtOAc in hexane,to provide the title compound (116 mg, 0.263 mmol, 54.1% yield) aslight-yellow solid. MS m/z=441 [M+H]₊

¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.78-1.05 (m, 5H) 1.07-1.26 (m, 2H)1.58-1.82 (m, 2H) 3.98-4.08 (m, 2H) 5.94-6.46 (m, 1H) 7.21 (dd, J=11.84,8.92 Hz, 1H) 7.75-7.94 (m, 1H) 7.97-8.16 (m, 3H) 8.69 (d, J=1.32 Hz, 1H)10.66 (s, 1H)

Table 8 includes compound examples prepared wherein the appropriatehalogenated intermediate was reacted with the corresponding alkyne(Examples 406-410) according to Method O:

TABLE 8 Example No Compound Name Compound Structure Analytical Data 406(1R,5S,6R)-5-(5- ((3- (cyclopropylethynyl)- 1,7- naphthyridin-8-yl)amino)-2- fluorophenyl)-5- (difluoromethyl)- 2-oxa-4-azabicyclo[4.1.0] hept-3-en-3-amine

MS m/z = 464.1 [M + H]+ ¹H NMR (300 MHz, DMSO- d₆) ppm 0.78-1.05 (m, 6H) 1.13-1.29 (m, 2 H) 1.60-1.71 (m, 1 H) 1.71-1.83 (m, 1 H) 3.93-4.21(m, 1 H) 5.90 (br. s., 2 H) 5.99-6.49 (m, 1 H) 7.04- 7.28 (m, 2 H)7.99-8.17 (m, 2 H) 8.27-8.40 (m, 2 H) 8.82 (d, J = 2.05 Hz, 1 H) 9.56(s, 4 H) 407 N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)- 2-oxa-4-azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)-5-(cyclopropylethynyl) pyrazine-2- carboxamide

MS m/z = 442.1 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) ppm 0.86-0.97 (m, 3 H)0.99-1.09 (m, 2 H) 1.15 (br. s., 1 H) 1.58-1.83 (m, 2 H) 4.02 (br. s., 1H) 5.85 (br. s., 2 H) 5.97-6.52 (m, 1 H) 7.22 (dd, J = 11.84 , 9.06 Hz,1 H) 7.86 (dd, J = 7.89, 3.51 Hz, 1 H) 8.04 (dd, J = 7.02, 2.78 Hz, 1 H)8.77 (d, J = 1.32 Hz, 1 H) 9.17 (d, J = 1.46 Hz, 1 H) 10.78 (s, 1 H) 408(1R,5S,6R)-5-(5- ((3- (cyclopropylethynyl)- 5-fluoro-1,7-naphthyridin-8- yl)amino)-2- fluorophenyl)-5- (difluoromethyl)- 2-oxa-4-azabicyclo[4.1.0] hept-3-en-3-amine

MS m/z = 482.1 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) ppm 0.84-0.94 (m, 3 H)0.96-1.05 (m, 2 H) 1.12-1.21 (m, 2 H) 1.63-1.84 (m, 3 H) 3.82-4.12 (m, 1H) 5.73-6.54 (m, 3 H) 7.05-7.28 (m, 1 H) 7.86-8.06 (m, 1 H) 8.14 (s, 1H) 8.36 (d, J = 2.05 Hz, 2 H) 8.92 (d, J = 1.90 Hz, 1 H) 9.56 (s, 1 H)409 N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)- 2-oxa-4-azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)-5- ((3-methyloxetan-3- yl)ethynyl)picolin- amide

MS m/z = 471 [M + H]+ ¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.82-1.00 (m, 1 H)1.09- 1.20 (m, 1 H) 1.68 (s, 3 H) 1.70-1.79 (m, 1 H) 3.96-4.10 (m, 1 H)4.48 (d, J = 5.70 Hz, 2 H) 4.80 (d, J = 5.41 Hz, 2 H) 5.86 (s, 2 H)5.96-6.43 (m, 1 H) 7.21 (dd, J = 11.84, 8.77 Hz, 1 H) 7.89 (ddd, J =8.81, 4.06, 2.78 Hz, 1 H) 8.00-8.19 (m, 3 H) 8.77 (dd, J = 1.75, 1.02Hz, 1 H) 10.71 (s, 1 H) 410 N-(3-((1R,5S,6R)- 3-amino-5-(difluoromethyl)- 2-oxa-4- azabicyclo[4.1.0] hept-3-en-5-yl)-4,5-difluorophenyl)-5- (cyclopropylethynyl) picolinamide

MS m/z = 458.9 [M + H]+ 1H NMR (CHLOROFORM-d) δ 9.63 (br. s, 1H), 8.38(d, J = 1.5 Hz, 1H), 7.92-8.12 (m, 2H), 7.79 (dd, J = 8.1, 2.0 Hz, 1H),7.22 (dt, J = 5.2, 2.4 Hz, 1H), 6.22 (td, J = 55.9, 0.9 Hz, 1H), 5.22(br. s., 2H), 3.86-3.95 (m, 1H), 1.79-1.90 (m, 2H), 1.39- 1.57 (m, 2H),0.84-1.01 (m, 5H)

Method P Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-((3-cyclopropylprop-2-yn-1-yl)oxy)pyrazine-2-carboxamide(Example 411)

To a solution of 3-cyclopropylprop-2-yn-1-ol (205 mg, 2.137 mmol) in DMF(1 mL) was added sodium hydride (60% dispersion in mineral oil; 8.6 mg,0.214 mmol) at rt. After 15 minN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropyrazine-2-carboxamide(Example 261, 88 mg, 0.214 mmol) was added and the reaction mixture wasstirred at 60° C. for 50 min. Water (1.0 mL) and aqueous, saturatedNaHCO₃ solution (1 mL) were added. The resulting mixture was thenextracted with EtOAc (2×10 mL). The combined organic extracts werewashed with water and dried over MgSO₄. The filtrate was concentratedunder reduced pressure and the residue was purified by silica gel flashcolumn chromatography (0%-20% MeOH/DCM) to give 58 mg of the titlecompound as an off-white solid. MS m/z=472 [M+H]⁺

1H NMR (MeOH) d: 8.90 (s, 1H), 8.29 (s, 1H), 7.86 (d, J=5.7 Hz, 2H),7.17 (t, J=10.1 Hz, 1H), 6.04-6.49 (m, 1H), 5.05 (s, 2H), 4.05 (br. s.,1H), 1.80-2.00 (m, 1H), 1.25-1.40 (m, 2H), 0.90-1.02 (m, 1H), 0.79 (d,J=7.6 Hz, 2H), 0.63 (br. s., 2H)

Table 9 includes compound examples prepared wherein the appropriatehalogenated intermediate was reacted with the corresponding alcohol(Examples 412-418) according to Method P:

TABLE 9 Example No Compound Name Compound Structure Analytical Data 412N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)-5- ((tetrahydro-2H-pyran-4- yl)methoxy)pyrazine- 2-carboxamide

MS m/z = 492.1 [M + H]+ 1H NMR (MeOH) d: 8.90 (d, J = 1.2 Hz, 1H), 8.30(d, J = 1.2 Hz, 1H), 7.79-7.92 (m, 2H), 7.06- 7.28 (m, 1H), 6.04-6.54(m, 1H), 4.34 (d, J = 6.5 Hz, 2H), 4.04-4.11 (m, 1H), 4.00 (dd, J =11.2, 3.9 Hz, 2H), 3.41-3.53 (m, 2H), 2.07-2.26 (m, 1H), 1.83-1.98 (m,1H), 1.78 (d, J = 12.9 Hz, 2H), 1.40-1.57 (m, 2H), 1.33 (br. s., 1H),0.89-1.06 (m, 1H) 413 N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2-oxa-4- azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)-5- (((R,S))-tetrahydrofuran-3- yl)methoxy)pyrazine- 2-carboxamide

MS m/z = 478.1 [M + H]+ 1H NMR (MeOH) d: 8.81-9.01 (m, 1H), 8.20-8.37(m, 1H), 7.77-7.92 (m, 2H), 7.09-7.24 (m, 1H), 6.07-6.48 (m, 1H),4.44-4.50 (m, 1H), 4.33-4.41 (m, 1H), 4.01-4.11 (m, 1H), 3.87-3.96 (m,2H), 3.67-3.82 (m, 2H), 2.75-2.91 (m, 1H), 2.08-2.25 (m, 1H), 1.84-1.97(m, 1H), 1.73-1.84 (m, 1H), 1.31-1.36 (m, 1H), 0.94-1.04 (m, 1H) 4145-(allyloxy)-N-(3- ((1R,5S,6R)-3- amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)pyrazine-2-carboxamide

MS m/z = 434.1 [M + H]+ 1H NMR (MeOH) d: 8.89 (s, 1H), 8.29 (s, 1H),7.86 (d, J = 5.9 Hz, 2H), 7.17 (t, J = 9.9 Hz, 1H), 6.00-6.48 (m, 2H),5.44 (d, J = 17.2 Hz, 1H), 5.30 (d, J = 11.2 Hz, 1H), 4.98 (d, J = 5.5Hz, 2H), 4.05 (br. s., 1H), 1.88 (d, J = 7.6 Hz, 1H), 1.33 (br. s., 1H),0.98 (d, J = 8.0 Hz, 1H) 415 N-(3-((1R,5S,6R)- 3-amino-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0] hept-3-en-5-yl)-4-fluorophenyl)-5- (cyclopropylmethoxy) pyrazine-2- carboxamide

MS m/z = 448.1 [M + H]+ 1H NMR (MeOH) d: 8.87 (s, 1H), 8.26 (s, 1H),7.85 (br. s., 1H), 7.04-7.30 (m, 1H), 6.05- 6.50 (m, 1H), 4.30 (d, J =7.0 Hz, 2H), 4.06 (br. s., 1H), 1.89 (d, J = 6.8 Hz, 1H), 1.34 (br. s.,2H), 0.99 (d, J = 7.4 Hz, 1H), 0.64 (d, J = 8.0 Hz, 2H), 0.40 (d, J =3.7 Hz, 2H) 416 N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)-5-(cyclohexylmethoxy) pyrazine-2- carboxamide

MS m/z = 490.1 [M + H]+ 1H NMR (MeOH) d: 8.91 (d, J = 1.2 Hz, 1H), 8.29(d, J = 1.2 Hz, 1H), 7.83-7.92 (m, 2H), 7.20 (dd, J = 11.7, 9.4 Hz, 1H),6.09- 6.48 (m, 1H), 4.29 (d, J = 6.1 Hz, 2H), 4.04-4.13 (m, 1H),1.88-1.97 (m, 4H), 1.72-1.86 (m, 3H), 1.26-1.43 (m, 4H), 1.11-1.22 (m,2H), 0.95-1.05 (m, 1H) 417 N-(3-((1R,5S,6R)- 3-amino-5-(difluoromethyl)-2- oxa-4- azabicyclo[4.1.0] hept-3-en-5-yl)-4-fluorophenyl)-5- ethoxypyrazine-2- carboxamide

MS m/z = 422.1 [M + H]+ 1H NMR (MeOH) d: 8.91 (d, J = 1.4 Hz, 1H), 8.28(d, J = 1.4 Hz, 1H), 7.78-7.92 (m, 2H), 7.11- 7.26 (m, 1H), 6.06-6.52(m, 1H), 4.46-4.62 (m, 2H), 4.00- 4.14 (m, 1H), 1.82-1.98 (m, 1H), 1.47(d, J = 14.3 Hz, 3H), 1.36 (br. s., 1H), 0.89-1.06 (m, 1H) 418N-(3-((1R,5S,6R)- 3-amino-5- (difluoromethyl)-2- oxa-4-azabicyclo[4.1.0] hept-3-en-5-yl)-4- fluorophenyl)-5-(cyclopentylmethoxy) pyrazine-2- carboxamide

MS m/z = 476.1 [M + H]+ 1H NMR (MeOH) d: 8.91 (d, J = 1.2 Hz, 1H), 8.29(d, J = 1.2 Hz, 1H), 7.79-7.95 (m, 2H), 7.19 (dd, J = 11.7, 9.6 Hz, 1H),6.06- 6.50 (m, 1H), 4.37 (d, J = 7.0 Hz, 2H), 4.07 (t, J = 5.5 Hz, 1H),2.35-2.56 (m, 1H), 1.83-1.97 (m, 3H), 1.57-1.78 (m, 4H), 1.29-1.52 (m,3H), 0.91-1.09 (m, 1H)

Method Q Example 419 Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo-[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-(hydroxymethyl)picolinamide

A solution ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-(methoxymethyl)picolinamide (Example 42, 140 mg, 0.308 mmol) in DCM was cooled to 0° C.Boron tribromide (0.062 mL, 0.646 mmol) was added dropwise and thereaction mixture was allowed to warm to rt. After 3 hs, the reaction wasquenched by the addition of water. The aq. phase was neutralized by theaddition of aq. sat bicarbonate solution and extracted with EtOAc. Theorganic phase was over MgSO4. The filtrate material was absorbed onto aplug of silica gel and purified by chromatography eluting with agradient of 15% to 100% EtOAc in hexane, to provide the title compound(62 mg, 0.141 mmol, 45.7% yield) as a whit solid. MS m/z=441 [M+H]⁺

₁H NMR (300 MHz, DMSO-d₆) δ ppm 0.79-1.02 (m, 1H) 1.15 (br. s., 1H)1.61-1.84 (m, 1H) 4.01 (br. s., 1H) 4.93 (d, J=5.55 Hz, 2H) 5.54 (t,J=5.55 Hz, 1H) 5.87 (br. s., 2H) 5.98-6.46 (m, 1H) 7.21 (dd, J=11.84,8.92 Hz, 1H) 7.78-7.97 (m, 2H) 8.20 (d, J=2.19 Hz, 1H) 8.64 (d, J=2.34Hz, 1H) 10.63 (s, 1H)

Table 10 includes compound examples prepared wherein the appropriatemethoxy compound was converted into the corresponding hydroxy-compoundaccording to Method Q (Examples 420, Table 10):

TABLE 10 Example No Compound Name Compound Structure Analytical Data 420N-(3-((1R,5S,6R)-3- amino-5- (fluoromethyl)-2-oxa- 4-azabicyclo[4.1.0]hept- 3-en-5-yl)-4- chlorophenyl)-5- chloro-3-(hydroxymethyl)picolin- amide

MS m/z = 439 [M]+ 1H NMR (300 MHz, DMSO- d6) δ ppm 0.74-0.99 (m, 2 H)1.57-1.75 (m, 1 H) 3.96 (br. s., 1 H) 4.57-4.71 (m, 1 H) 4.73-4.86 (m, 1H) 4.94 (br. s., 2 H) 5.43-5.64 (m, 3 H) 7.41 (d, J = 7.89 Hz, 1 H) 7.85(d, J = 8.62 Hz, 1 H) 8.04 (br. s., 1 H) 8.21 (br. s., 1 H) 8.65 (s, 1H) 10.66 (br. s., 1 H)

Example 421

Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropyridine-2-sulfonamideStep 1: 2-(benzylthio)-5-chloropyridine

To a suspension of cesium carbonate (3.76 g, 11.5 mmol) in DMF (20 mL)at room temperature was added 5-chloro-2-fluoropyridine (1.00 mL, 9.96mmol) and benzylmercaptan (1.15 mL, 9.80 mmol). The reaction mixture wasstirred at room temperature for 16 h and heated to 60° C. for 6 h. Thereaction mixture was diluted with Et₂O. The organic phase was washedwith water (2×), brine and dried over MgSO₄. The filtrate wasconcentrated under reduced pressure and the residue was purified byflash column chromatography on silica gel (5% to 10% EtOAc in heptane)to give the title compound (2.33 g, 9.88 mmol, 101% yield) as acolorless oil that was used without further purification in the nextstep. MS) m/z=236.1 [M+H]+. Calculated for C₁₂H₁₀ClNS 235.0.

Step 2: 5-chloropyridine-2-sulfonyl chloride

Chlorine gas was bubbled through a solution of2-(benzylthio)-5-chloropyridine (2.33 g, 9.88 mmol) in DCM (65 mL) andwater (13 mL) at 0° C. for 20 min, followed by purging with Nitrogen for15 min. The reaction mixture was transferred to a separatory funnel anddiluted with water. The aqueous was discarded and the organic phase waswashed with brine and dried over MgSO₄. The filtrate was concentratedunder reduced pressure to give a colorless oil that was used withoutfurther purification in the next step. LC/MS (ESI⁺) m/z=211.9 (M+H).Calculated for C₅H₃Cl₂NO₂S 210.9.

Step 3: tert-butyl((1R,5S,6R)-5-(5-(5-chloropyridine-2-sulfonamido)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate

To a solution of tert-butyl((1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(16i-B, 0.059 g, 0.16 mmol) in DCM (1.5 mL) at 0° C. were addedtriethylamine (0.070 mL, 0.50 mmol) and 5-chloropyridine-2-sulfonylchloride (0.034 g, 0.16 mmol). The reaction mixture was allowed to warmup to room temperature over a period of 2 h and then diluted with EtOAcand water. The aqueous phase was extracted with EtOAc (2×). The combinedorganic extracts were washed with brine and dried over MgSO₄. Thefiltrate was concentrated under reduced pressure and the residue waspurified by flash column chromatography on silica gel (10% to 50% EtOAcin heptane) to give the title compound (0.061 g, 0.11 mmol, 70% yield)as a colorless oil. MS m/z=547.0 [M+H]+. Calculated for C₂₂H₂₂ClF₃N₄O₅S546.1.

Step 4:N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloropyridine-2-sulfonamide

To a solution of tert-butyl((1R,5S,6R)-5-(5-(5-chloropyridine-2-sulfonamido)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(0.061 g, 0.11 mmol) in DCM (2 mL) at room temperature was addedtrifluoroacetic acid (2.0 mL). The reaction mixture was stirred at roomtemperature for 30 min and concentrated under reduced pressure. Theresidue was partitioned between saturated NaHCO₃ and EtOAc. The aqueousphase was extracted with EtOAc (2×). The combined organic extracts werewashed with brine and dried over MgSO₄. The filtrate was concentratedunder reduced pressure and the residue was purified by flash columnchromatography on silica gel (30% to 70% EtOAc in heptane) to give thetitle compound (0.045 g, 0.10 mmol, 90% yield) as a white solid. MSm/z=446.9 [M+H]+. Calculated for C₁₇H₁₄ClF₃N₄O₃S 446.0. ¹H NMR (400 MHz,CDCl₃) δ 0.80-0.90 (m, 1H), 1.33 (t, J=6.85 Hz, 1H), 1.69-1.78 (m, 2H),3.65-3.70 (m, 1H), 5.70 (s br, 2H), 6.06 (t, J=56.10 Hz, 1H), 6.95 (dd,J=6.75, 2.64 Hz, 1H), 7.06 (dd, J=11.44, 8.71 Hz, 1H), 7.45 (ddd,J=8.56, 4.25, 2.84 Hz, 1H), 7.72 (s, 2H), 8.33 (s, 1H).

Example 422

Synthesis of a 1:1 mixture of(1R,5S,6R)-5-(5-(((R)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineand(1R,5S,6R)-5-(5-(((S)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineStep 1: 1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethanol

To a solution of 5-chloropicolinaldehyde (0.505 g, 3.57 mmol) in THF (7mL) at 0° C. were added (trifluoromethyl)trimethylsilane (0.685 mL, 4.63mmol) and tetra-N-butylammonium fluoride (1 M in THF, 0.036 mL, 0.036mmol). The reaction mixture was stirred at 0° C. for 15 min and dilutedwith water (10 mL) and additional tetra-N-butylammonium fluoride (1 M inTHF, 2.0 mL, 2.0 mmol). The reaction mixture was allowed to warm to roomtemperature and stirred for 30 min. The reaction mixture was dilutedwith EtOAc, the organic phase was separated and washed with water, brineand dried over MgSO₄. The filtrate was concentrated under reducedpressure and the residue was purified by flash column chromatography onsilica gel (5% to 20% EtOAc in heptane) to give the title compound(0.643 g, 3.04 mmol, 85% yield) as a yellow oil. MS m/z=211.9 [M+H]+.Calculated for C₇H₅ClF₃NO 211.0.

Step 2: 1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethanone

To a solution of 1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethanol (0.643g, 3.04 mmol) in DCM (9 mL) at 0° C. was added1,1,1-tris(acetyloxy)-1,1-dihydro-1,2-benziodoxol-3-(1H)-one (1.55 g,3.65 mmol). The reaction mixture was allowed to warm to room temperatureand stirred for 20 h before quenching with saturated NaHCO₃ (10 mL) andsaturated sodium thiosulfate solution. The reaction mixture was stirredfor 20 min and transferred to a separatory funnel. The aqueous phase wasdiscarded and the organic phase was washed with brine and dried overMgSO₄ The filtrate was concentrated under reduced pressure and theresidue was purified by flash column chromatography on silica gel (5% to30% EtOAc in heptane) to afford the title compound (0.545 g, 2.60 mmol,86% yield) as a pale yellow oil. LC/MS (ESI⁺) m/z=209.9 (M+H).Calculated for C₇H₃ClF₃NO 209.0.

Step 3: tert-butyl((1R,5S,6R)-5-(5-(((R)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamateand tert-butyl((1R,5S,6R)-5-(5-(((S)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate

To a solution of tert-butyl((1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(16i-B, 0.121, 0.326 mmol) and1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethanone (0.070 g, 0.33 mmol) inDCM (1.5 mL) at −78° C. were added triethylamine (0.135 mL, 0.969 mmol)and titanium chloride (1 M in DCM, 0.360 mL, 0.360 mmol). The cold bathwas removed and the reaction mixture was allowed to stir at roomtemperature over 10 min. The reaction mixture was again cooled to −78°C. and lithium aluminium hydride (1.0 M in THF, 0.660 mL, 0.660 mmol)was added. The reaction mixture was stirred at −78° C. for 20 min andquenched with EtOAc. Saturated aqueous sodium potassium tartrate (5 mL)was added. The mixture was warmed to room temperature and stirred for 45min. The mixture was transferred to a separatory funnel. The aqueousphase was extracted with EtOAc (2×). The combined organic extracts werewashed with brine and dried over MgSO₄. The filtrate was concentratedunder reduced pressure and the residue was purified by flash columnchromatography on silica gel (10% to 50% EtOAc in heptane) to give a 1:1mixture of tert-butyl((1R,5S,6R)-5-(5-(((R)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamateand tert-butyl((1R,5S,6R)-5-(5-(((S)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(0.070 g, 0.124 mmol, 38% yield combined yield) as a white solid. MSm/z=565.1 (M+H). Calculated for C₂₄H₂₃ClF₆N₄O₃ 564.1.

Step 4:(1R,5S,6R)-5-(5-(((R)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineand(1R,5S,6R)-5-(5-4(S)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

To a solution of tert-butyl((1R,5S,6R)-5-(5-(((R)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamateand tert-butyl((1R,5S,6R)-5-(5-(((S)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)carbamate(1:1 mixture of diastereomers, 0.070 g, 0.12 mmol) in DCM (2 mL) at roomtemperature was added trifluoroacetic acid (2.00 mL, 0.124 mmol). Thereaction mixture was stirred at room temperature for 30 min andconcentrated. The concentrate was partitioned between saturated NaHCO₃and EtOAc. The aqueous phase was discarded. The organic phase was washedwith brine and dried over MgSO₄. The filtrate was concentrated underreduced pressure and the residue was purified by flash columnchromatography on silica gel (12 g, 20% to 60% EtOAc in heptane) to give(1R,5S,6R)-5-(5-(((R)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineand(1R,5S,6R)-5-(5-(((S)-1-(5-chloropyridin-2-yl)-2,2,2-trifluoroethyl)amino)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(1:1 mixture of diastereomers, 0.056 g, 0.120 mmol, 97% yield) as awhite solid. MS m/z=465.0 [M+H]+. Calculated for C₁₉H₁₅ClF₆N₄O 464.1. ¹HNMR (400 MHz, CDCl₃) δ 0.86-0.95 (m, 1H), 1.32-1.41 (m, 1H), 1.73-1.85(m, 1H), 3.83-3.90 (m, 1H), 4.50 (br s, 2H), 4.87-4.97 (m, 1H), 5.33(dd, J=11.93, 7.63 Hz, 1H), 6.02-6.34 (m, 1H), 6.60-6.66 (m, 1H),6.87-6.96 (m, 2H) 7.27-7.35 (m, 1H), 7.65-7.70 (m, 1H), 8.57-8.59 (m,1H).

Example 423

Synthesis of N-(3-(((1R,S),(5S,R),(6R,S))-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)phenyl)-5-chloropicolinamideStep 1:N-(((1RS),(5S,R),(6R,S))-5-(5-azido-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide

The title compound was isolated as a byproduct from the reactiondescribed in step 4 for the conversion of 6c-rac into 6d-rac. MSm/z=400.0 [M+H]⁺. Calculated for C₁₉H₁₅ClFN₅O₂: 399.8

Step 2: N-(((1R,S), (5S,R),(6R,S))-5-(3-aminophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide

A sealable vial was charged withN-(((1RS),(5S,R),(6R,S))-5-(5-azido-2-chlorophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(0.25 g, 0.625 mmol),1,1-bis[(di-t-butyl-p-methylaminophenyl]palladium(II) chloride (0.089 g,0.125 mmol), and sodium formate (0.255 g, 3.75 mmol). The vial wasevacuated and backfilled with N₂ gas. DMF (3 ml) was added and thereaction was stirred in a pre-heated 90° C. oil bath for 48 hours. Thereaction was cooled to ambient temperature and additional sodium formate(0.255 g, 3.75 mmol) and1,1-bis[(di-t-butyl-p-methylaminophenyl]palladium(II) chloride (0.089 g,0.125 mmol) were added. The reaction mixture was purged with nitrogenand heated to 130° C. for an additional 72 hours. The reaction wascooled to ambient temperature and diluted with water and EtOAc. Theorganic layer was separated and washed sequentially with water, 1M LiClaqueous solution, and brine before being dried over magnesium sulfate.The filtrate was concentrated under reduced pressure and the cruderesidue was purified via silica gel flash chromatography using agradient of 10-70% EtOAc in hexanes to afford the title compound as alight yellow oil (0.04 g, 0.118 mmol, 18.85% yield)

MS m/z=340.0 [M+H]⁺. Calculated for C₁₉H₁₈FN₃O₂: 339.4

Step 3: N-(3-(((1R,S),(5S,R),(6R,S))-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)phenyl)-5-chloropicolinamide

The title compound was prepared using a procedure similar to thatdescribed in step 4 for the synthesis of 4d rac, but using N-(((1R,S),(5S,R),(6R,S))-5-(3-aminophenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide

MS m/z=374.9 M. Calculated for C₁₈H₁₆ClFN₄O₂: 374.8

1H NMR (300 MHz, CHLOROFORM-d) δ ppm 0.95-1.05 (m, 1H) 1.27-1.31 (m, 1H)1.68-1.77 (m, 1H) 4.07-4.15 (m, 1H) 4.40-4.59 (m, 1H) 4.60-4.79 (m, 1H)7.31-7.37 (m, 1H) 7.38-7.46 (m, 1H) 7.73-7.79 (m, 1H) 7.87-7.94 (m, 2H)8.24-8.29 (m, 1H) 8.57-8.60 (m, 1H) 9.87 (s, 1H)

Example 424

Synthesis ofN-(3-(((1RS),(5S,R),(6R,S))-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoro-4-(methylsulfonyl)phenyl)-5-chloropicolinamide

To a solution ofN-(3-(((1S,R),(5S,R),(6R,S))-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoro-4-(methylthio)phenyl)-5-chloropicolinamide(0.019 g, 0.043 mmol, Example 141) in MeCN (0.1 mL), water (0.15 mL) andEtAc (0.1 mL) was added sodium (meta)periodate (0.037 g, 0.173 mmol) andruthenium(III) chloride (0.5 mg, 2.165 μmol). The reaction mixture wasstirred at RT for 30 min, then diluted with DCM and filtered through acotton plug. Water was added to the filtrate and the phases wereseparated. The aqueous layer was extracted with DCM (3×) times and thecombined organic layers were dried over sodium sulfate. The filtrate wasconcentrated under reduced pressure and the crude material was purifiedby column chromatography, eluting with 1-10% 2M ammonia in MeOH/DCM, togive the title compound (0.012 g, 0.025 mmol, 58.9% yield).

MS m/z=471.0 [M+H]⁺. Calculated for C₁₉H₁₇ClF₂N₄O₄S: 470.9.

¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.90-1.06 (m, 1H) 1.14-1.33 (m, 1H) 1.75(m, 1H) 3.40 (s, 3H) 3.78-3.92 (m, 1H) 4.55-4.76 (m, 1H) 4.81 (m, 1H)5.67 (br. s., 2H) 8.06 (d, J=14.48 Hz, 1H) 8.15-8.26 (m, 2H) 8.30 (s,1H) 8.82 (s, 1H) 11.12 (br. s., 1H)

Example 425

Synthesis of(1S,5R,6S)-5-(5-(6-chlorobenzo[d]oxazol-2-yl)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineStep 1:

To a solution of(1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-A, 2.20 g, 6.56 mmol) in DMF (20 mL) under nitrogen was added TEA(1.37 mL, 9.85 mmol) and benzoic anhydride (1.66 g, 7.35 mmol). Thereaction mixture was stirred at RT overnight, then diluted with aqueoussaturated Na₂CO₃ solution and extracted with EtOAc twice. The organicphase was washed with water, brine and dried over Na₂SO₄. The filtratewas concentrated in vacuo and the crude was purified by silica gelchromatography (0-50% EtOAc-hexane) to obtainN-((1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(16e-A) as a white solid (2.88 g, 100% yield).

MS m/z=439, 441 [M+H]⁺. Calculated for C₁₉H₁₄BrF₃N₂O₂: 439.2.

Step 2:

A sealable vial was charged with-((1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(16e-A, 1.05 g, 2.39 mmol),(9,9-dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine) (0.15 g, 0.26mmol), palladium (II) acetate (0.029 g, 0.13 mmol), methanol (0.97 ml,23.86 mmol) and triethylamine (4.99 ml, 35.8 mmol). The vial wasevacuated and backfilled with CO gas. The reaction mixture was stirredat 65° C. overnight, then diluted with EtOAc and filtered through a padof celite. The filtrate was washed with water, brine and dried overNa₂SO₄. The filtrate was concentrated in vacuo and the crude waspurified by silica gel chromatography (0-100% EtOAc-DCM) to obtainmethyl3-((1S,5R,6S)-3-benzamido-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorobenzoateasa yellow solid (0.69 g, 69% yield). MS m/z=419 [M+H]⁺. Calculated forC₂₁H₁₇F₃N₂O₄: 418.4.

Step 3:

A sealable vial was charged with methyl3-((1S,5R,6S)-3-benzamido-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorobenzoate(0.100 g, 0.24 mmol), 2-amino-5-chlorophenol (0.086 g, 0.60 mmol) andpolyphosphoric acid (0.50 mL). The reaction mixture was purged withnitrogen for 1 min and then heated to 170° C. for 1 h. The reactionmixture was allowed to cool to rt, neutralized with aqueous, saturatedNa₂CO₃ solution and 1 N NaOH. The mixture was extracted three times witha solvent mixture of CHCl₃:i-PrOH (3:1). The combined organic extractswere dried over Na₂SO₄, and concentrated in vacuo. The crude waspurified first by silica gel chromatography 0-100% EtOAc-hexane. Thecollected fractions were further purified by reverse-phase preparativeHPLC using a Phenomenex Gemini column, 10 micron, C18, 100 Å, 150×30 mm,0.1% TFA in CH₃CN/H₂O, gradient 10% to 100% over 16 min. The fractionscontaining the desired product were combined and neutralized with solidNa₂CO₃. The aqueous phase was extracted with DCM and dried over Na₂SO₄.The filtrate was concentrated in vacuo to obtain the title compound as abeige solid (10.5 mg, 11% yield). MS m/z=408 [M+H]⁺. Calculated forC₁₉H₁₃ClF₃N₃O₂: 407.8.

¹H NMR (400 MHz, CHLOROFORM-d) δ=8.44 (dd, J=2.3, 7.4 Hz, 1H), 8.07(ddd, J=2.3, 4.6, 8.5 Hz, 1H), 7.57 (d, J=8.4 Hz, 1H), 7.36 (d, J=1.8Hz, 1H), 7.29 (dd, J=2.0, 8.4 Hz, 1H), 7.20 (dd, J=8.4, 11.5 Hz, 1H),6.41-6.07 (m, 1H), 4.90 (br. s., 2H), 4.03-3.90 (m, 1H), 1.91 (td,J=7.1, 9.5 Hz, 1H), 1.51-1.43 (m, 1H), 1.07-0.95 (m, 1H).

Example 426

Synthesis of(1R,5S,6R)-5-(5-(6-chlorobenzo[d]oxazol-2-yl)-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

The title compound was synthesized according to procedures and stepsanalogous to those described for Example 423 above, but using(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-B) in step 1. MS m/z=408 [M+H]⁺. Calculated for C₁₉H₁₃ClF₃N₃O₂:407.8.

¹H NMR (400 MHz, CHLOROFORM-d) δ=8.43 (dd, J=2.2, 7.4 Hz, 1H), 8.04(ddd, J=2.3, 4.7, 8.4 Hz, 1H), 7.55 (d, J=8.4 Hz, 1H), 7.32 (d, J=1.6Hz, 1H), 7.28 (dd, J=2.0, 8.4 Hz, 1H), 7.19 (dd, J=8.4, 11.5 Hz, 1H),6.42-6.07 (m, 1H), 5.01 (br. s., 2H), 4.03-3.91 (m, 1H), 1.98-1.86 (m,1H), 1.48 (t, J=5.9 Hz, 1H), 1.08-0.94 (m, 1H).

Example 427

Synthesis of3-((1S,5R,6S)-3-Amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-N—((S)-1-methoxypropan-2-yl)benzamideStep 1:

A sealable vial was charged withN-((1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(16e-A, 0.4060 g, 0.924 mmol), palladium acetate (9.34 mg, 0.042 mmol),9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene ((0.029 g, 0.051 mmol),sodium carbonate (0.058 ml, 1.387 mmol) and toluene (1.849 ml).(S)-(+)-1-Methoxy-2-propylamine (0.195 ml, 1.849 mmol) was added and COgas was bubbled through the reaction mixture for 10 minutes. Thereaction mixture was heated to 80° C. for 3 hours. The reaction mixturewas cooled to rt, adsorbed onto a plug of silica gel and purified byflash chromatography, eluting with a gradient of 5% to 80% EtOAc inhexane, to provide3-41S,5R,6S)-3-benzamido-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-N—((S)-1-methoxypropan-2-yl)benzamide(0.3780 g, 0.795 mmol, 86% yield).

MS m/z=476.0 [M+H]⁺Calculated from C₂₄H₂₄F₃N₃O₄: 475.172

¹H NMR (300 MHz, CHLOROFORM-d) δ ppm 1.18 (d, J=6.58 Hz, 3H) 1.73 (br.s., 1H) 2.18 (dt, J=9.46, 7.03 Hz, 1H) 3.14 (s, 3H) 3.26 (d, J=3.65 Hz,2H) 3.37 (d, J=3.80 Hz, 1H) 4.24 (br. s., 2H) 6.10-6.57 (m, 1H)7.16-7.26 (m, 1H) 7.37-7.61 (m, 4H) 7.88-8.05 (m, 1H) 8.22 (br. s., 1H)

Step 2:

A flask was charged with3-((1S,5R,6S)-3-benzamido-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-N—((S)-1-methoxypropan-2-yl)benzamide(0.3780 g, 0.795 mmol), 1,8-diazabicyclo-[5.4.0]undec-7-ene (0.143 ml,0.954 mmol) and MeOH (7.95 ml). The reaction mixture was heated to 65°C. for 4 hours. The crude product was adsorbed onto a plug of silica geland purified by flash chromatography, eluting with a gradient of 10% to100% EtOAc:EtOH (75:25) in hexane, to provide the title compound (0.0563g, 0.152 mmol, 19.07% yield).

MS m/z=372.0 [M+H]⁺Calculated for C₁₇H₂₀F₃N₃O₃: 371.146

¹H NMR (400 MHz, DMSO-d₆) δ ppm 0.85-0.98 (m, 1H) 1.15 (d, J=6.85 Hz,4H) 1.71-1.85 (m, 1H) 3.22-3.35 (m, 6H) 3.42 (dd, J=9.59, 6.46 Hz, 1H)4.00 (t, J=5.38 Hz, 1H) 4.13-4.25 (m, 1H) 5.94 (s, 2H) 6.00-6.36 (m, 1H)7.32 (dd, J=11.93, 8.61 Hz, 1H) 7.86 (ddd, J=8.36, 4.55, 2.35 Hz, 1H)8.07 (dd, J=7.82, 2.35 Hz, 1H) 8.21 (d, J=8.02 Hz, 1H)

¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.24 (dt, J=9.39, 6.46 Hz, 1H)2.44-2.55 (m, 3H) 3.11 (dt, J=9.24, 6.92 Hz, 1H) 3.80-3.89 (m, 3H)4.58-4.68 (m, 5H) 4.75 (dd, J=9.59, 6.46 Hz, 1H) 5.28-5.36 (m, 1H)5.45-5.59 (m, 1H) 7.34-7.69 (m, 1H) 8.64 (dd, J=11.93, 8.41 Hz, 1H) 9.19(ddd, J=8.41, 4.50, 2.35 Hz, 1H) 9.40 (dd, J=7.82, 2.35 Hz, 1H) 9.53 (d,J=8.02 Hz, 1H)

Example 428

Synthesis of3-((1R,5S,6R)-3-Amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluoro-N—((S)-1-methoxypropan-2-yl)benzamide

The title compound was synthesized by procedures and steps analogous tothose described for Example 427above, but usingN-((1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(16e-B), in step 1. MS m/z=372.0 [M+H]⁺. Calculated for C₁₇H₂₀F₃N₃O₃:371.146

¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.92-1.06 (m, 1H) 1.28 (d, J=6.65Hz, 3H) 1.42 (br. s., 1H) 1.85 (q, J=7.76 Hz, 1H) 3.38 (s, 3H) 3.45 (br.s., 2H) 3.50 (s, 1H) 3.94 (br. s., 1H) 4.35 (br. s., 1H) 6.02-6.36 (m,1H) 6.39 (d, J=6.46 Hz, 1H) 7.16 (t, J=9.98 Hz, 1H) 7.81 (br. s., 1H)7.94 (d, J=7.24 Hz, 1H)

Example 429

Synthesis of(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

A microwave vial was charged with mixture of potassium phosphate (0.19g, 0.90 mmol),(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-B, 0.10 g, 0.30 mmol), (5-(prop-1-yn-1-yl)pyridin-3-yl)boronic acid(0.12 g, 0.75 mmol) and1,1-bis[(di-t-butyl-p-methylaminophenyl]palladium(II) chloride (10.56mg, 0.015 mmol) in dioxane/water (2.0/0.5 mL). The reaction mixture washeated to 110° C. for 30 min in the microwave. The reaction mixture wasthen diluted with water and extracted with DCM three times. The combinedorganic extracts were washed with brine and dried over sodium sulfate.The filtrate was concentrated in vacuo and the crude material waspurified by silica gel chromatography (0-100% EtOAc-DCM) to obtain thetitle compound as a white solid (82.3 mg, 74% yield). MS m/z=372 [M+H]⁺.Calculated for C₂₀H₁₆F₃N₃O: 371.4.

¹H NMR (400 MHz, CHLOROFORM-d) δ=8.65 (d, J=2.3 Hz, 1H), 8.55 (d, J=1.8Hz, 1H), 7.80 (t, J=2.1 Hz, 1H), 7.73 (dd, J=2.3, 7.4 Hz, 1H), 7.49(ddd, J=2.4, 4.6, 8.4 Hz, 1H), 7.19 (dd, J=8.4, 11.7 Hz, 1H), 6.40-6.04(m, 1H), 4.44 (br. s., 2H), 3.99-3.88 (m, 1H), 2.08 (s, 3H), 1.93-1.82(m, 1H), 1.48-1.38 (m, 1H), 1.03-0.93 (m, 1H).

Example 430

Synthesis of(1S,5R,6S)-5-(difluoromethyl)-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

The title compound was synthesized according to the procedure describedfor Example 429above, but using(1S,5R,6S)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-A). MS m/z=372 [M+H]⁺. Calculated for C₂₀H₁₆F₃N₃O: 371.4.

¹H NMR (400 MHz, CHLOROFORM-d)=8.64 (d, J=2.2 Hz, 1H), 8.53 (d, J=1.8Hz, 1H), 7.78 (t, J=2.1 Hz, 1H), 7.73 (dd, J=2.4, 7.3 Hz, 1H), 7.49(ddd, J=2.5, 4.5, 8.4 Hz, 1H), 7.19 (dd, J=8.5, 11.6 Hz, 1H), 6.41-6.02(m, 1H), 4.53 (br. s., 2H), 4.01-3.86 (m, 1H), 2.06 (s, 3H), 1.87 (td,J=7.0, 9.5 Hz, 1H), 1.48-1.37 (m, 1H), 0.97 (td, J=6.7, 9.2 Hz, 1H).

Example 431

Synthesis of 2946458(1(S,R),5(R,S),6(S,R))-5-(2-fluoro-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

Step 1:N-(((1R,S),(5R,S),(6R,S))-5-(2-fluoro-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamidewas synthesized according to the procedure described for Example 429above, but using (6f-rac). MS m/z=458 [M+H]⁺.Step 2: A solution ofN-(((1R,S),(5R,S),(6R,S))-5-(2-fluoro-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-yl)benzamide(0.253 g, 0.277 mmol) in MeOH (3.5 mL) under argon atmosphere wastreated with 1,8-diazabicyclo-[5.4.0]undec-7-ene (0.4 ml, 2.68 mmol).The reaction mixture was heated at 60° C. for 3 h. The reaction mixturewas cooled to room temperature, and the suspension was filtered. Thesolid was rinsed with MeOH to give the title compound (0.0944 g) as awhite solid. MS m/z=354.3 [M]⁺.

1H NMR (400 MHz, DMSO-d6) δ ppm 8.75 (d, J=2.15 Hz, 1H), 8.58 (d, J=1.57Hz, 1H), 7.99 (s, 1H), 7.78 (dd, J=7.53, 2.25 Hz, 1H), 7.69-7.75 (m,1H), 7.32 (dd, J=11.93, 8.41 Hz, 1H), 5.77 (s, 2H), 4.46-4.75 (m, 2H),4.01 (t, J=5.67 Hz, 1H), 2.11 (s, 3H), 1.51-1.75 (m, 1H), 1.03 (td,J=6.26, 2.35 Hz, 1H), 0.82 (dt, J=9.39, 6.46 Hz, 1H).

Example 432

Synthesis of (4-(((1S,R), (5R,S),(6S,R))-3-amino-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-5-fluoro-2-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)methanolStep 1

To a solution of1-bromo-4-fluoro-5-iodo-2-(((4-methoxybenzyl)oxy)methyl)benzene(intermediate 60, 0.766 g, 1.291 mmol) in Et₂O (3.7 mL) at −78° C. wasadded a solution of n-butyllithium (2.5M in hexanes, 0.516 mL, 1.291mmol) dropwise. The solution was stirred at −78° C. for 15 min. In aseparate flask, a solution of4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hex-3-ene (6c rac, 0.114 g,0.993 mmol) in toluene (4.5 mL) was treated with boron fluoride diethyletherate at −78° C. This solution was added via cannula to the aryllithium solution and the resulting reaction mixture was stirred at −78°C. for 1 h. The reaction was quenched with saturated aqueous ammoniumchloride at −78° C. and diluted with water and EtOAc. The layers wereseparated and the aqueous layer was extracted with EtOAc. The combinedorganic extracts were washed with water, brine, and dried over sodiumsulfate. The filtrate was concentrated in vacuo and the crude materialwas purified by silica gel chromatography, eluting with 1:9 EtOAc inheptane, to provide [(1S,R), (4R,S),(5S,R)]-4-(5-bromo-2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane.MS m/z=440.2/442.0 (M+H).

Steps 2-4: [(1R,S), (5S,R),(6R,S)]-5-(5-bromo-2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

The title compound was synthesized using procedures similar to thosedescribed in steps 2-4 for the synthesis of 4d rac, but using [(1S,R),(4R,S),(5S,R)]-4-(5-bromo-2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-4-(fluoromethyl)-2-oxa-3-azabicyclo[3.1.0]hexane.MS m/z=467.0/469.0 (M+H).

Step 5

[(1R,S),(5S,R),(6R,S)]-5-(2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-aminewas synthesized in an analogous manner as Example 390, but using[(1R,S), (5S,R),(6R,S)]-5-(5-bromo-2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amineand (5-(prop-1-yn-1-yl)pyridin-3-yl)boronic acid. MS m/z=504.2 (M+H).

Step 6

2,3-Dichloro-5,6-dicyano-p-benzoquinone (0.040 g, 0.178 mmol) was addedin one portion to a solution of [(1R,S),(5S,R),(6R,S)]-5-(2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)-5-(5-(prop-1-yn-1-yl)pyridin-3-yl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.069 g, 0.137 mmol) in DCM (1.3 ml) and water (0.065 ml) at roomtemperature. After 40 minutes, an additional amount of2,3-dichloro-5,6-dicyano-p-benzoquinone (0.040 g, 0.178 mmol) was added.After 40 minutes, the reaction was partitioned between EtOAc and 1NNaOH. The layers were separated and the aqueous layer was extracted withEtOAc. The combined organic extracts were washed with 1N NaOH, brine,and dried over sodium sulfate. The filtrate was concentrated in vacuo togive the crude material which was purified by silica gel chromatography,eluting with 1:20 2M NH₃.MeOH in CH₂CL₂, to afford the title compound.MS m/z=384.0 (M+H).

1H NMR (400 MHz, METHANOL-d4) δ ppm 0.84-0.96 (m, 1H) 1.12-1.22 (m, 1H)1.24-1.38 (m, 1H) 1.72-1.84 (m, 1H) 2.08 (s, 3H) 3.97-4.08 (m, 1H) 4.46(s, 2H) 4.69 (d, J=47.30 Hz, 2H) 7.31 (d, J=7.63 Hz, 1H) 7.38 (d,J=13.11 Hz, 1H) 7.80 (s, 1H) 8.41 (s, 1H) 8.52 (s, 1H)

Example 433

Synthesis of (5-fluoro-4-([(1R,S), (5S,R),(6R,S)]-5-(fluoromethyl)-3-imino-2-oxa-4-azabicyclo[4.1.0]heptan-5-yl)-2-(5-fluoropyridin-3-yl)phenyl)methanolStep 1:

A glass microwave reaction vessel was charged with the [(1R,S), (5S,R),(6R,S)]-5-(5-bromo-2-fluoro-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(step 4 in Example 393, 0.0709 g, 0.152 mmol), sodium carbonate (0.096g, 0.910 mmol), and 5-fluoropyridine-3-boronic acid (0.034 g, 0.243mmol) in 1,4-dioxane (1.2 ml) and water (0.4 ml). The vessel was cappedand the solution was degassed by bubbling nitrogen gas through thesolution for 10 minutes. Next, Aphos-PdCl₂ (10.74 mg, 0.015 mmol) wasadded and the vessel was sealed. The reaction mixture was stirred andheated in a Initiator microwave reactor (Personal Chemistry, Biotage AB,Inc., Upssala, Sweden) at 120° C. for 20 minutes. The reaction waspoured into water and the mixture was extracted with EtOAc. The combinedorganic extracts were washed with water, saturated aqueous sodiumchloride, and dried over sodium sulfate. The solution was filtered andconcentrated in vacuo to give the crude material. The crude material wastaken up in MeCN (1.6 mL) and 4-(dimethylamino)pyridine (0.037 g, 0.303mmol) and di-tert-butyl dicarbonate (0.073 g, 0.334 mmol) were added.After 2.5 hours, the reaction was concentrated and purified by silicagel chromatography by eluting with 1:2 EtOAc/Heptanes, to provide[(1R,S), (5S,R), (6R,S),Z]-tert-butyl3-((tert-butoxycarbonyl)imino)-5-(2-fluoro-5-(5-fluoropyridin-3-yl)-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]heptane-4-carboxylate.MS m/z=684.2 (M+H).

Step 2:

2,3-Dichloro-5,6-dicyano-p-benzoquinone (0.027 g, 0.121 mmol) was addedin one portion to a solution of [(1R,S), (5S,R), (6R,S),Z]-tert-butyl3-((tert-butoxycarbonyl)imino)-5-(2-fluoro-5-(5-fluoropyridin-3-yl)-4-(((4-methoxybenzyl)oxy)methyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]heptane-4-carboxylatein DCM (0.9 ml) and water (0.045 ml) at room temperature. After 2 hours,the reaction is filtered through a plug of aluminum oxide (activated,neutral, Brockmann I) with 1:9 MeOH/DCM. Removal of the solvents invacuo to afford [(1R,S), (5S,R), (6R,S),Z]-tert-butyl3-((tert-butoxycarbonyl)imino)-5-(2-fluoro-5-(5-fluoropyridin-3-yl)-4-(hydroxymethyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]heptane-4-carboxylatewhich is used directly in the next step without further purification.LC/MS (ESI⁻) m/z=586 (M+Na), 564.2 (M+H).

Step 3:

Trifluoroacetic acid (1 mL, 13.46 mmol) was added in one portion to asolution of [(1R,S), (5S,R), (6R,S),Z]-tert-butyl3-((tert-butoxycarbonyl)imino)-5-(2-fluoro-5-(5-fluoropyridin-3-yl)-4-(hydroxymethyl)phenyl)-5-(fluoromethyl)-2-oxa-4-azabicyclo[4.1.0]heptane-4-carboxylate(0.052 g, 0.092 mmol) in DCM (2 mL) at RT. After 45 minutes, thereaction was concentrated and the crude material was partitioned betweenDCM and 10% Na₂CO₃. The layers were separated and the aqueous layer wasextracted with DCM. The combined organic extracts were washed withsaturated aqueous sodium chloride and dried over sodium sulfate. Thesolution was filtered and concentrated in vacuo to give the crudematerial. The crude material was purified by silica gel chromatographyby eluting with 1:20 2M NH₃.MeOH in CH₂CL₂, to provide the titlecompound. LC/MS (ESP) m/z=364.1 (M+H).

1H NMR (400 MHz, METHANOL-d4) δ ppm 0.86-0.96 (m, 1H) 1.13-1.21 (m, 1H)1.72-1.84 (m, 1H) 3.97-4.07 (m, 1H) 4.48 (s, 2H) 4.69 (d, J=48.12 Hz,2H) 5.49 (s, 1H) 7.29-7.46 (m, 2H) 7.71 (d, J=9.59 Hz, 1H) 8.40 (s, 1H)8.49 (s, 1H)

Example 434

Synthesis of(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(4-(prop-1-yn-1-yl)-1Hpyrazol-1-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

A sealable vial was charged with potassium carbonate, (0.095 g, 0.686mmol),(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(16f-B, 0.100 g, 0.298 mmol), and 4-(prop-1-yn-1-yl)-1H-pyrazole(intermediate 61, 0.041 g, 0.388 mmol). The vial was evacuated andbackfilled with nitrogen twice before adding toluene (3 ml) and 0.1 mLof a premixed stock solution of copper(I) iodide (55 mg) andtrans-N,N′-dimethylcyclohexane-1,2-diamine (0.2 mL) in toluene (1 mL).The reaction mixture was heated at 110° C. overnight. The reaction waspoured into a 9:1 mixture of aqueous saturated ammoniumchloride/ammonium hydroxide and the mixture was extracted with EtOAc.The combined organic extracts were washed with a 9:1 mixture of aqueoussaturated ammonium chloride/ammonium hydroxide, brine, and dried oversodium sulfate. The filtrate was concentrated in vacuo to give the crudematerial which was purified by reverse-phase preparative HPLC using aPhenomenex Gemini column, 10 micron, C18, 100 Å, 150×30 mm, 0.1% TFA inCH₃CN/H₂O, gradient 10% to 95% over 15 min to provide the purifiedproduct as the TFA salt. The product was partitioned between DCM and aq.10% Na₂CO₃. The layers were separated and the aqueous layer wasextracted with DCM. The combined organic extracts were washed with brineand dried over sodium sulfate. The filtrate was concentrated in vacuo toafford the title compound as the free base.

MS m/z=361.1 [M+H]

¹H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.96-1.05 (m, 1H) 1.36-1.48 (m, 1H)1.80-1.93 (m, 1H) 2.03 (s, 3H) 3.86-4.01 (m, 1H) 6.20 (t, J=56.34 Hz,1H) 7.10-7.23 (m, 1H) 7.26 (s, 1H) 7.66 (s, 1H) 7.76 (m, 1H) 7.88 (s,1H)

Example 435

Synthesis of(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(4-(prop-1-yn-1-yl)-1Hpyrazol-1-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

The title compound was synthesized according to the procedure describedfor Example 432, above, but using 4-(cyclopropylethynyl)-1H-pyrazole(Intermediate 62).

MS m/z=387.0 [M+H]⁺.

¹H NMR (400 MHz, METHANOL-d4) δ ppm 0.64-0.75 (m, 2H) 0.79-0.91 (m, 2H)0.91-1.02 (m, 1H) 1.20-1.37 (m, 1H) 1.38-1.48 (m, 1H) 1.87-1.96 (m, 1H)3.35 (s, 1H) 4.01-4.09 (m, 1H) 6.17 (t, J=56.14 Hz, 1H) 7.27 (dd,J=11.35, 9.00 Hz, 1H) 7.66 (s, 1H) 7.67-7.74 (m, 1H) 7.84 (dd, J=6.46,2.74 Hz, 1H) 8.20 (s, 1H).

Example 436

Synthesis of methyl6-((3-((1S,5R,6S)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)carbamoyl)nicotinateStep 1:

Methyl6-((3-((1S,5R,6S)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)carbamoyl)nicotinimidatewas isolated as a by-product in the coupling of(1S,5R,6S)-5-(5-amino-2,3-difluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(20f-A) with 5-cyano-2-pyridinecarboxylic acid according to method B.

Step 2:

Methyl6-((3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4,5-difluorophenyl)carbamoyl)nicotinimidate(0.050 g, 0.111 mmol) was dissolved in hydrochloric acid (2N, 5 mL,10.00 mmol) and stirred at room temperature. After 15 minutes, thereaction mixture was neutralized with 1 N sodium hydroxide (10 mL). Asolution of aqueous saturated sodium bicarbonate (5 mL) was added andthe mixture stirred for 10 minutes. The suspension was filtered and thesolid was washed with water (10 mL). The solid was further purified bysilica gel chromatography [10-90% (2% NH4OH in 3:1 ethyl acetate:ethanol) in hexane] to give the title compound (0.0298 g, 0.066 mmol,59.5% yield). MS m/z=452.9 [M+H]⁺.

1H NMR (CHLOROFORM-d) Shift: 9.75 (s, 1H), 9.04 (dd, J=2.0, 0.7 Hz, 1H),8.48 (dd, J=8.0, 2.0 Hz, 1H), 8.26 (dd, J=8.1, 0.7 Hz, 1H), 7.99 (ddd,J=11.7, 7.0, 2.8 Hz, 1H), 7.22-7.28 (m, 1H), 6.23 (td, J=55.8, 0.9 Hz,1H), 5.17 (br. s., 2H), 4.01 (s, 3H), 3.92 (td, J=6.8, 2.6 Hz, 1H),1.80-1.92 (m, 1H), 1.40-1.49 (m, 1H), 0.90-1.03 (m, 1H)

Example 437

Synthesis of6-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-3-chloro-5H-pyrrolo[3,4-b]pyridin-7(6H)-one

A solution ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-chloro-3-(hydroxymethyl)picolinamide(Example 420, 60 mg, 0.136 mmol) in DCM (2 mL) was cooled 0° C. undernitrogen atmosphere. A solution of Deoxo-fluor, (50 w % in THF, 0.150mL, 0.408 mmol) was added dropwise and the reaction mixture was allowedto stir at rt for 25 min. The reaction mixture was poured into aqueoussaturated bicarbonate solution and extracted with EtOAc. The crudematerial was absorbed onto a plug of silica gel and purified bychromatography, eluting with a gradient of 20% to 100% EtOAc in hexane,to provide the title compound as white solid. MS m/z=423 [M+H]⁺.

¹H NMR (300 MHz, DMSO-d₆) δ ppm 0.80-0.98 (m, 1H) 1.16 (br. s., 1H)1.66-1.88 (m, 1H) 3.99 (t, J=5.41 Hz, 1H) 5.52 (s, 2H) 5.84-6.47 (m, 3H)7.19 (dd, J=11.84, 8.62 Hz, 1H) 7.33 (ddd, J=8.62, 4.38, 2.78 Hz, 1H)7.47 (dd, J=7.31, 2.63 Hz, 1H) 8.27 (d, J=2.19 Hz, 1H) 8.82 (d, J=2.19Hz, 1H)

Example 438

Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)phenyl)-5-methoxypyrazine-2-carboxamide

The title compound was isolated as a byproduct during the synthesis ofthe methyl derivativeN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-methylphenyl)-5-chloropicolinamide(Example 295) described above.

1H NMR (300 MHz, CHLOROFORM-d) δ ppm 9.54 (br. s., 1H) 9.01 (br. s., 1H)8.14 (br. s., 1H) 7.92 (br. s., 1H) 7.78 (d, J=4.97 Hz, 1H) 7.38 (br.s., 2H) 5.80 (t, J=56.42 Hz, 1H) 3.96-4.15 (m, 4H) 1.80 (d, J=7.31 Hz,1H) 1.43 (br. s., 1H) 1.01 (d, J=6.58 Hz, 1H). MS m/z=390 [M+H]+.

Example 439

Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(methylamino)pyrimidine-2-carboxamidedihydrochloride Step 1: Tert-butyl(2-((3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)carbamoyl)pyrimidin-5-yl)(methyl)carbamate

The title compound was prepared using the procedure described in MethodA above but using5-((tert-butoxycarbonyl)(methyl)amino)pyrimidine-2-carboxylate,Intermediate 81. MS m/z=507.0 [M+H]⁺.

Step 2:N-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(methylamino)pyrimidine-2-carboxamidedihydrochloride

A solution of tert-butyl(2-((3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)carbamoyl)pyrimidin-5-yl)(methyl)carbamate(0.06 g, 0.11 mmol) in 1,4-dioxane (2 mL) was treated with HCl (4.0M in1,4-dioxane; 1 mL). The resulting suspension was treated with water (0.1mL) resulting in a pale-yellow biphasic solution. The solution wasstirred for 2 h, concentrated, and lyophilized from 1,4-dioxane to giveN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-5-(methylamino)pyrimidine-2-carboxamidedihydrochloride (0.05 g, 0.105 mmol, 93% yield) as a pale-yellow solid.

1H NMR (400 MHz, DMSO-d6): δ 10.61-10.78 (m, 2H), 9.54 (br. s, 1H), 8.37(br. s., 1H), 8.25 (s, 2H), 8.14 (dd, J=2.54, 7.24 Hz, 1H), 7.98-8.05(m, 1H), 7.41 (dd, J=9.00, 11.93 Hz, 1H), 6.76 (t, J=53 Hz, 1H),4.83-5.56 (br. s, 2H), 4.69 (dt, J=2.74, 6.65 Hz, 1H), 2.86 (s, 3H),2.12 (td, J=7.09, 9.49 Hz, 1H), 1.63 (t, J=6.26 Hz, 1H), 1.25-1.38 (m,1H). MS m/z=407.0 [M+H]⁺.

Example 440

Step 1:(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

A glass microwave reaction vessel was charged with(1R,5S,6R)-5-(5-bromo-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(0.11 g, 0.32 mmol), potassium acetate (0.095 g, 0.967 mmol),(1,1′-bis(diphenylphosphino)ferrocene)dichloropalladium(II) (0.024 g,0.032 mmol), and bis(pinacolato) diboron (0.098 g, 0.387 mmol). Thevessel was evacuated and flushed with nitrogen twice. Next, degassedDMSO (1.5 ml) was added and the reaction mixture was heated in an oilbath at 80° C. After two hours, the reaction was poured into water andthe mixture was extracted with EtOAc. The combined organic extracts werewashed with water, saturated aqueous sodium chloride, and dried oversodium sulfate. The solution was filtered and concentrated in vacuo togive the intermediate(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-aminewhich was used without further purification. LC/MS (ESI⁻) m/z=383.1(M+H).

Step 2.(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(5-(4-fluorophenyl)-4H-1,2,4-triazol-3-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine

A glass microwave reaction vessel was charged with sodium carbonate(0.171 g, 1.609 mmol), 3-bromo-5-(4-fluorophenyl)-4H-1,2,4-triazole(0.078 g, 0.322 mmol, US20130184248 A1),(1R,5S,6R)-5-(difluoromethyl)-5-(2-fluoro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine,1,4-dioxane (2.5 ml) and water (0.83 ml). The vessel was capped and thesolution was degassed by bubbling nitrogen gas through the solution for10 minutes. Next, 1,1-bis[(di-t-butyl-p-methylaminophenyl]palladium(II)chloride (0.023 g, 0.032 mmol) was added and the vessel was sealed. Thereaction mixture was stirred and heated in a Initiator microwave reactor(Personal Chemistry, Biotage AB, Inc., Upssala, Sweden) at 120° C. for20 minutes. The reaction was poured into water and the mixture wasextracted with EtOAc. The combined organic extracts were washed with a9:1 mixture of aqueous saturated ammonium chloride/ammonium hydroxide,saturated aqueous sodium chloride, and then stirred with activatedcarbon. The solution was filtered through a pad of celite andconcentrated in vacuo to give the crude material. The crude material waspurified by silica gel chromatography by eluting with 1:40 2M NH₃.MeOHin CH₂CL₂, and then repurified by preparative TLC by eluting with 1:302M NH₃.MeOH in CH₂CL₂ to provide the titled compound as a white solidafter concentration with MeOH.

LC/MS (ESP) m/z=418.1 (M+H)⁺.

1H NMR (400 MHz, MeOH-d4) δ ppm 0.95-1.04 (m, 1H) 1.36 (m, 1H) 1.90-1.99(m, 1H) 4.05-4.13 (m, 1H) 6.28 (t, J=56.34 Hz, 1H) 7.23-7.29 (m, 2H)7.27-7.34 (m, 1H) 8.03-8.16 (m, 3H) 8.28 (dd, J=7.53, 1.86 Hz, 1H)

Example 451

Synthesis ofN-(3-((1R,5S,6R)-3-amino-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-5-yl)-4-fluorophenyl)-2,4,6-trifluorobenzamide

To a solution of 2,4,6-trifluorobenzoic acid (120 mg, 0.681 mmol,Aldrich) in dichloromethane (2 mL) was added oxalyl chloride (0.242 mL,2.73 mmol, Aldrich), followed by catalytic amounts of DMF (20 μL). Thereaction mixture was stirred at room temperature for 3 h. The reactionmixture was concentrated under reduced pressure and the residue wasdissolved in DCM (2 mL). This solution was added dropwise to a separatesolution of(1R,5S,6R)-5-(5-amino-2-fluorophenyl)-5-(difluoromethyl)-2-oxa-4-azabicyclo[4.1.0]hept-3-en-3-amine(185 mg, 0.682 mmol) and diisopropylethylamine (0.12 mL, 0.682 mmol) indichloromethane (2.5 mL) cooled to 0° C. After completed addition, thereaction mixture was stirred for 20 min at 0° C. The reaction mixturewas quenched with aqueous saturated sodium bicarbonate solution andextracted with DCM (2×3 mL). The combined organic extracts were driedover MgSO4 and concentrated under reduced pressure. The residue wasdissolved in MeOH (1.5 mL) and cooled to 0° C. H₂O (4 mL) was added tothe solution and the mixture was stirred at 0° C. for 1 h. The whitesolid was filtered off, washed with H₂O and dried in under reducedpressure to give 203 mg of the title compound as a white solid.

LC/MS (ESI−) m/z=430.1 [M+H]+.

1H NMR (MeOH) δ: 7.80-7.88 (m, 1H), 7.75 (dd, J=6.9, 2.6 Hz, 1H), 7.20(dd, J=11.7, 8.8 Hz, 1H), 7.04 (t, J=8.4 Hz, 2H), 6.12-6.48 (m, 1H),4.07 (t, J=5.5 Hz, 1H), 1.83-1.94 (m, 1H), 1.34 (br. s., 1H), 0.96-1.05(m, 1H)

Table 11 contains representative compounds of the invention (theexamples presented herein) and their mass observed and associatedbiological data, including BACE enzyme assay, BACE cell assay andCathepsin D (Cat D) assay, inhibitory data expressed as μM IC₅₀'s. Theassays procedures and data measurements are described hereinbelow.

TABLE 11 BACE1 BACE Enzyme cell assay assay CatD Example Observed IC₅₀IC₅₀ IC₅₀ No Mass (μM) (μM) (μM) 2b-rac 372 0.6045 0.109 81.3 2b-A 3720.2526 0.059 >400.0 2b-B 372 41.247 >10.0 42.8 28 441.1 0.1175 0.0765907.85 29 467.1 0.2065 0.656 462.46 30 424.9 0.0432 0.0285 469.07 31422.9 0.306 0.0282 339.22 32 410.8 1.22 0.232 1021.9 33 432.1 0.00540.0014 116 34 432.1 6.215 1.75 622.6 35 446.1 0.0016 0.0006 255.77 36446.1 0.2955 0.176 526.5 37 402.2 0.0698 0.0164 364.12 38 402 16.5 3.152618.4 39 457 0.0469 0.0179 109.25 40 457 6.495 1.91 516.14 41 407.20.1345 0.0284 238.44 42 455.1 0.0277 0.0444 735.56 43 425.2 0.02250.0314 595.96 44 416.1 0.0142 0.017 376.16 45 432.2 0.0555 0.0372 3449.446 450.1 0.018 0.0046 173.5 47 450.1 21.15 1.76 967.7 48 410.8 0.04390.0141 154 49 415.8 0.0308 0.0082 202 50 415.8 26.621 >15.6 1746.2 51458.9 0.0627 0.0143 113 52 458.9 >40.0 >15.6 1630.1 53 425.9 0.0616 2.38577.31 54 425.9 2.51 2.24 459.52 55 411 0.0362 0.0431 859.98 56 422.90.0129 0.003 302.76 57 422.9 2.25 0.455 332.73 58 422 0.158 0.179 821.9159 401.9 0.0345 0.0242 899.1 60 410.9 >40.0 >15.6 >400.0 61 463.9 0.16680.0701 1780.3 62 435.8 0.0266 0.0397 1099.3 63 422.1 0.0637 0.0584 99.7564 422.1 6.185 >15.6 191 65 402 21.15 >15.6 >400.0 66 436 0.0153 0.0274825.02 67 436 26.45 >15.6 1285.9 68 375 0.065 0.0063 476.18 69 463.90.126 0.0372 439.58 70 440.8 0.0568 0.0386 378.87 71 444.8 0.0276 0.0273477.76 72 407.9 0.0763 0.0604 1112.3 73 411.8 0.1145 0.331 274.5 74454.7 0.0247 0.0181 282.5 75 402.9 0.165 0.284 347.61 76 410.9 0.02660.0302 684.31 77 402 0.0268 0.0226 697.75 78 406.9 >40.0 >15.6 >400.0 79406.9 3.0389 0.1195 941.65 80 401.9 7.95 0.183 >400.0 81401.9 >40 >15.6 >400 82 404.9 2.74 0.157 >400.0 83404.9 >40.0 >15.6 >400.0 84 437.9 0.4945 0.361 >400.0 85 423.9 0.0340.0067 373.1 86 447.8 0.0759 0.0094 891.6 87 472.8 0.0323 0.0135 164.588 417.9 0.0294 0.0098 301.5 89 437.9 0.0731 0.0245 574.2 90 491.90.0136 0.0213 913 91 431.9 0.0506 0.0073 260 92 427 17.05 >15.6 769.5 93418 0.0191 0.0131 1301.3 94 418 31.911 >15.6 1922 95 431.9 0.0035 0.008143 96 446 0.001 0.0033 467.37 97 427 0.0371 0.0505 1281.2 98 418 0.04430.033 1160.8 99 426.8 0.0227 0.0195 1053 100 422.9 0.0611 0.0209 190.5101 437 0.0971 0.0598 258.46 102 490.9 0.0356 0.013 591.85 103 407.90.1215 0.0574 762.63 104 424 0.0873 0.0339 374.14 105 394 39.34 2.1051616 106 394 0.252 0.0456 216 107 428.9 0.0196 0.0578 213 108 428.910.365 >15.6 471.87 109 419.9 12.05 >15.6 >400.0 110 467.9 26.194 >17.41482.5 111 449.9 6.505 3.79 1001 112 425.9 >40.5 >15.8 4184 113 419.90.0275 0.0392 >618.0 114 467.8 0.0098 0.0198 158.5 115 449.9 0.00210.0059 42.45 116 472.9 0.0185 0.0411 81.884 117 393 0.0211 0.0053 471.71118 393 1.56 0.2207 1279.1 119 412 0.0559 0.0524 2992.6 120 490.1 0.050.247 351.42 121 424.9 0.0833 0.0616 206 122 439 0.099 0.0148 1074.1 123424.9 0.0305 0.0122 257.25 124 424.9 3.53 1.21 1232.4 125 457 0.08060.0086 >400.0 126 454.9 0.0835 0.0146 1203.8 127 433.8 0.0395 0.0078996.82 128 452.9 0.0508 0.0161 1001.6 129 428.9 0.0389 0.0403 1275.4 130407 0.0845 0.0586 987.71 131 421 0.185 0.0809 342.49 132 430 0.02140.0153 725.41 133 449.9 0.023 0.0158 558.46 134 454.9 0.1305 0.06041109.4 135 458.9 0.0256 0.0199 493.69 136 418 0.1195 0.0214 490.74 137431.9 0.0448 0.0162 539.09 138 432 0.0362 0.0151 662.08 139 431.9 14.252.24 645.65 140 448 0.006 0.0059 86.9 141 439 >40.0 >15.6 654.54 142 4100.0971 0.0263 229.08 143 408 0.125 0.0221 529.16 144 407.9 >40.0 4.621336.8 145 422.9 0.153 0.0197 220 146 422.9 >40.0 >15.6 768.31 147 4360.7315 1 706.05 148 446 0.195 0.448 848.58 149 433 0.1945 0.152 1703.3150 416.9 0.0322 0.0182 238.37 151 431 24.805 1.07 302.5 152 424.90.1275 0.0476 403.83 153 473, 475 0.143 0.0762 555.42 154 430 0.24 0.109514.64 155 424.1, 426 >40.0 >15.6 646.57 156 424.1, 426 0.055 0.0199896.76 157 473.1, 475.1 28.314 >15.6 395.99 158 473.1, 475.1 0.04030.0383 230.5 159 505.9, 508 0.2255 0.466 1047.2 160 476 0.0291 0.08082001.4 161 442 >40.0 >15.6 294.98 162 446 0.0085 0.0175 1063.5 163 449.90.0137 0.0179 464.44 164 431.9 0.0232 0.0109 949.93 165 491 0.01920.0606 383.22 166 380.9 0.0613 0.103 372.96 167 475 0.0124 0.0103 767.26168 398.9 0.0116 0.0101 56.75 169 490.9 0.0366 0.0418 581.85 170 490.90.0867 0.56 444.85 171 475 0.0811 0.323 845.84 172 490 0.0824 0.446360.35 173 474 0.0366 0.0789 1011.5 174 475 0.0233 0.0186 925.02 175 4132.88 2.48 1344.4 176 395.9 0.1905 0.156 834.71 177 415.9 0.185 0.373762.01 178 406.9 1.075 1.56 534.11 179 415.9 0.8705 0.661 474.39 180 4250.0918 0.0449 >1.65 181 416 1.4 1.14 580.11 182 455.1 13.1 3.36 565.49183 422.9 0.0998 0.0218 882.02 184 446 0.3575 0.62 1087.4 185 405 0.10660.148 752.56 186 440.9 0.061 0.0345 767.7 187 408 3.44 1.41 667.11 188459 0.04 0.0279 159 189 489 0.1195 0.386 770 190 391 0.151 0.0735 1465.3191 457 0.4145 0.5355 1073.1 192 384 0.0256 0.0079 590.78 193 427.10.0449 0.0108 875.42 194 390.2 0.1425 0.027 1225.6 195 389.2 0.12410.0156 759.19 196 397.9 0.0324 0.009 703.11 197 414.1 0.0066 0.0023260.5 198 407.1 0.0338 0.0152 348.84 199 428.1 0.0022 0.0005 958.61 200446.1 0.189 0.025 464.93 201 423 0.0638 0.0179 515.09 202 409.1 0.49950.159 430.21 203 427.1 0.0089 0.0039 303.02 204 385 0.1455 0.0335 293.5205 413 0.0274 0.0089 820.88 206 415.1 0.0094 0.0064 310.79 207 4330.0578 0.0176 370.2 208 410.9 0.15 3.64 489.48 209 472.9 0.0908 0.0765958.31 210 461.8 0.0039 0.0096 569.43 211 460.8 0.0126 0.0147 >400.0 212472.9 0.0469 0.0385 928.32 213 472.9 2.415 1.31 1128 214 470.7 0.00930.0132 459.3 215 461.9 0.0017 0.0043 1932.3 216 461.8 0.8375 1.28 500.14217 474.9 0.0151 0.0116 206.03 218 428.9 0.861 >15.6 >400.0 219 447.90.0063 0.0068 65.8 220 465.8 0.0188 0.0169 690.71 221 447.9 0.00270.0033 51.05 222 447.8 0.701 0.885 493.18 223 431.9 0.0184 0.0314 541.28224 465.8 0.0105 0.0252 509.92 225 465.8 8.27 3.82 1340.3 226 423.80.0895 0.0394 363 227 417.8, 419.8 0.0469 0.0105 2256.3 228 417.8, 419.90.0419 0.0059 1013.9 229 422.9, 424.9 0.0341 0.0064 956.16 230 394.1,396 11.95 2.23 >400.0 231 394.1, 396 0.165 0.0277 389.59 232 431 0.01640.0418 587.65 233 445.1 0.0057 0.024 243.5 234 424 0.283 0.0596 >14.8235 437.9, 440.9 0.1255 0.0188 1806.9 236 475 0.104 0.296 4249.4 237457.1 0.0377 0.0323 326.91 238 444 0.0214 0.0178 5917.5 239382.1 >40.0 >15.6 >400.0 240 344.1 0.821 0.712 48.15 241396.1 >40.0 >15.6 >400.0 242 384.1 >40.0 >15.6 1909.5 243 380.1 24.4214.07 1026.3 244 370.1 5.37 1.98 318.54 245 450 >40.0 >15.6 447.24 246464.1 >40.0 >15.6 323.7 247 358.1 25.543 4.34 486.4 248 407 40.486 >15.61229.8 249 407 >40.0 >15.6 1586.3 250 471.1 0.0218 0.603 77.5 251 3824.7 2 190 252 438 >40.0 [2] >15.6 270.5 253 370.1 34.304 >15.6 188 254386.1 >40.0 [2] >15.6 2563.5 255 388.1 >40.0 [2] >15.6 666.15 256 406.16.66 2.18 331 257 358 1.84 2.54 376.54 258 368 20.054 2.6 117 259 446.10.6595 0.473 668.25 260 340.1 5.17 3.19 103.95 261 412 0.037 1.59 444262 400.1 0.2455 0.144 203.5 263 392.9 0.525 0.289 1060.3 264 392.935.904 >15.6 >400.0 [2] 265 392.9 0.265 0.0279 397 266 391 0.817 0.7761164.7 267 456.9 0.0415 0.015 1015.2 268 446 269 398 0.0936 0.0533715.76 270 409.1 0.0669 0.0122 646.37 271 409.1 24.087 2.33 >400.0 272406.1 0.1425 0.0274 1733.6 273 406.1 36.33 2.66 1973 274 452.9 0.03220.012 537.75 275 452.9 3.605 0.906 1129.8 276 409.1 0.1375 0.0242 918.19277 400.1 0.0568 0.0192 1561.6 278 400.1 9.51 2.64 904.39 279 430.10.0056 0.0086 123.5 280 430.1 4.78 2.89 1473.8 281 443 0.0441 0.006 2867282 405 0.1955 0.0243 649.74 283 414.1 0.031 0.0075 1579.9 284 439.10.1225 0.0149 752.05 285 444 0.0022 0.0006 1834.7 286 411.1 1.57 1.12724.59 287 411.1 1.93 2.11 1625.7 288 419.1 3.345 2.22 1255.7 289 453.20.305 0.116 699.95 290 505 0.0141 0.0222 251.5 291 453.2 1.145 1.87 148292 377.1 0.3005 0.279 689.7 293 391.1 0.271 0.601 1661.3 294 404 0.31350.0612 684.34 295 407 0.0903 0.0129 464.36 296 455 4.185 3.51 1859.4 297439 0.1835 0.0074 834.64 298 416.9 0.099 0.0332 >400.0 299 422.1 0.03050.014 465.44 300 436.1 0.1415 0.0405 447.11 301 420 0.3525 0.031 714.94302 443 0.0315 0.0141 810.69 303 439.1 0.03 0.0283 334.88 304 421.10.0522 0.0359 354.98 305 435 0.1175 0.0696 287.99 306 425.1 0.04190.0256 1036.8 307 425.1 0.413 0.139 >400.0 308 442.9 0.0177 0.0321 186309 430 0.0743 0.0387 421.05 310 430 >40.0 >15.6 1771.5 311 430 0.04660.0174 293.79 312 442.9 0.0377 0.0179 441.81 313 401 0.0248 0.0176466.88 314 415 0.0467 0.0891 420.55 315 505.9 0.0936 0.0927 556.39 316505.9 >40.0 >15.6 1076.7 317 448 0.0028 0.0014 41 318 448 4.07 1.49370.02 319 372 10.75 >400.0 320 372 0.0565 0.0213 >400.0 321 412 0.3390.295 212.5 322 373 1.99 0.1845 521.42 323 373 >40.0 >15.6 >400.0 324367 0.1495 0.0283 182 325 367 >40.0 Undefined 1294.4 326 375.9 0.24250.0323 279 327 375.9 2.135 0.703 1316.3 328 409.9 0.1034 0.0116 511.67329 409.9 >40.0 9.6 1611 330 403 0.1005 0.0326 139 331 403 26.7 >15.61511.9 332 438.8 >40.0 >15.6 163 333 376, 377.9 0.1297 0.0132 815.58 334376, 377.9 0.0944 0.0089 401.92 335 376, 377.9 14.05 1.42 >400.0 336 3730.4355 0.0416 >400.0 337 394.1 3.345 >400.0 338 394.1 >40.0 56.55 339394 8.11 >400.0 340 394 0.5065 0.0796 >400.0 341 434.2 3.41 3.41 2885.6342 434.2 0.0598 0.12 50.55 343 425.2 0.0949 0.0546 >44.4 344 430 4300.0982 596.19 345 416.1 0.0713 0.0543 282 346 407.2 0.0539 0.0176 204.89347 417 0.1325 0.0624 105.75 348 430.1 0.456 0.106 738.32 349 458.90.0829 0.222 88.357 350 458.9 0.0319 0.0628 >14.8 351 458.9 2.8152.52 >14.8 352 442.9 0.0391 0.0593 192.21 353 434.9 0.0639 0.0503 141.05354 430.9 12.65 1.46 292 355 430.9 >40.0 >15.6 2745.5 356 446.9 0.06590.0494 725.38 357 474.9 0.375 0.918 322.62 358 403.1 2.09 0.134 >400.0359 431.9 0.0291 0.0656 251.18 360 428 1.26 0.139 843.04 361 452 0.02780.207 >400.0 362 434 0.0335 0.254 399.58 363 441 0.0682 0.13 >44.4 364431.1 0.224 0.122 596.24 365 469.1 0.2045 0.254 >44.4 366461 >13.7 >16.0 127.61 367 461 0.0515 0.524 102.63 368 340.1 2.74 1.33121 369 386.1 6.635 3.02 19.2 370 436.1, 438.1 13.65 8.85 63.6 371 40211.16 2.67 102.35 372 402 9.415 4.94 85.45 373 418 0.159 0.0318 234 374435.8 0.0954 0.0779 115.5 375 352.1 5.995 2.53 78.85 376 394.1 2.1 1.1552.9 377 397.1 2.845 1.11 177 378 411 13.85 2.13 77.4 379 326.1 1.410.564 188.5 380 467 0.143 0.145 336.16 381 467 3.445 1.67 83.3 382 4833.07 0.993 263 383 429 0.968 0.352 206 384 467 0.315 1.37 82.55 385 4230.253 1.74 153 386 443.9 0.0251 0.0085 1815.7 387 430 0.0391 0.0145352.1 388 419.9 0.0352 0.0069 1272.6 389 445 0.0915 0.0747 732.46 390416 0.025 0.0205 441.28 391 446 0.0116 0.0175 1353.2 392 407.2 393 4080.1975 0.0243 147 394 444 0.134 0.289 1066.6 395 452.1 0.0144 0.0737476.95 396 432 0.017 0.151 197.5 397 430.1 0.081 0.009 >400 398 4340.0335 0.0123 690.32 399 446.1 0.0706 0.0208 1090 400 425.9 401 4140.1081 0.0575 555.02 402 414 0.976 0.318 205.5 403 428.1 2.855 0.677468.84 404 413.1 0.291 0.252 131.5 405 441 0.0237 0.215 398.53 406 464.10.0759 0.861 8908.4 407 442.1 0.0296 0.301 169.85 408 482.1 0.0463 1.58346.95 409 471 0.327 0.514 748.15 410 458.9 411 472 0.0076 0.112 359.77412 492.1 0.1285 0.984 640.34 413 478.1 0.145 0.865 >400.0 414 434.10.048 0.146 924.06 415 448.1 0.043 0.0551 747.3 416 490.1 0.0121 2.5228.15 417 422.1 0.1154 0.0876 1465.1 418 476.1 0.0261 0.916 890.72 419441 0.0332 0.0293 275.5 420 439 0.0515 0.0187 532.83 421 446.914.15 >15.6 223.5 422 465 5.245 4.06 68.2 423 374.9 0.3965 0.0441 591.98424 471 1.035 0.254 831.86 425 408 0.6133 0.5905 240.27 426 408 1.23653.1 195.65 427 372 >40.0 >15.6 >400.0 428 372 >40.0 >15.6 1522.3 429 3721.0475 3.36 72.85 430 372 >40.0 >15.6 1016.5 431 354.2 4.685 1.59 91.6432 384 33.135 3.68 177.69 433 364.1 23.099 4.41 612.81 434 361.1 1.210.561 385.6 435 387 8.625 4.79 315.5 436 452.9 >36.0 >14.1 343.18 437423 2.185 0.384 659.31 438 390 0.5 0.126 792.77 439 407 0.473 0.32489.92 440 418.1 >40.0 >15.6 249.59 441 441 0.0252 0.01585 444.19 442442 0.0544 0.0134 1137.4 443 423 0.0373 0.01365 517.38 444 457 0.01050.0313 171 445 393 0.2905 0.031 1270.5 446 425.1 0.05585 0.107 657.71447 431.1 0.139 0.167 500.52 448 448.1 0.11735 0.0863 169 449 469.10.1245 0.268 79.35 450 418.1 0.05025 0.00817 >400 451 430.1 5.385 6.28959.56

The present invention also provides methods for making compounds ofFormulas I-III, and sub-formulas therein. For example, the compounds ofthe present invention and additional examples may be made by thefollowing methods, as similarly described in the literature referencesmentioned below.

In one embodiment of the invention, there is provided a method of makinga compound of Formula I-A having a general structure of

the method comprising the step of reacting a compound 20

wherein A⁴, A⁵, A⁶, A⁸, each R¹, each R² and R³ of Formula I-A are asdefined herein, with a compound having the structure R⁹—COOH, wherein R⁹is as defined herein, to make a compound of Formula I-A.

In one embodiment of the invention, there is provided a method of makinga compound of Formula I-B having a general structure of

the method comprising the step of reacting a compound 20

wherein A⁴, A⁵, A⁶, A⁸, each R¹, each R² and R³ of Formula I-B are asdefined herein, with a compound having the structure

wherein each W and each R¹⁰ are, independently, as defined herein, inthe presence of acid to make a compound of Formula I-B.

In one embodiment of the invention, there is provided a method of makinga compound of Formula I-C

the method comprising the step of reacting a compound 20

wherein A⁴, A⁵, A⁶, A⁸, each R¹, each R² and R³ of Formula I-C are asdefined herein, with a compound having the structure

wherein each W and each R¹⁰ are, independently, as defined herein, tomake a compound of Formula I-C.

In another embodiment of the invention, there is provided a method ofmaking a compound of Formula II having a general formula of

the method comprising the step of reacting a compound 30

wherein A⁴, A⁵, A⁶, A⁸, each R², R³ and R⁷ of Formula II are as definedherein, with a compound having either structure of R⁹—COOH in thepresence of a base or R⁹—Cl in the presence of an acid, wherein R⁹ is asdefined herein, to make a compound of Formula II.

As can be appreciated by the skilled artisan, the above syntheticschemes and representative examples are not intended to comprise acomprehensive list of all means by which the compounds described andclaimed in this application may be synthesized. Further methods will beevident to those of ordinary skill in the art. Additionally, the varioussynthetic steps described above may be performed in an alternatesequence or order to give the desired compounds.

For example, in these procedures, the steps may be preceded, orfollowed, by additional protection/deprotection steps as necessary.Particularly, if one or more functional groups, for example carboxy,hydroxy, amino, or mercapto groups, are or need to be protected inpreparing the compounds of the invention, because they are not intendedto take part in a specific reaction or chemical transformation, variousknown conventional protecting groups may be used. For example,protecting groups typically utilized in the synthesis of natural andsynthetic compounds, including peptides, nucleic acids, derivativesthereof and sugars, having multiple reactive centers, chiral centers andother sites potentially susceptible to the reaction reagents and/orconditions, may be used.

Synthetic chemistry transformations and protecting group methodologies(protection and deprotection) useful in synthesizing the inhibitorcompounds described herein are known in the art and include, forexample, those such as described in R. Larock, Comprehensive OrganicTransformations, VCH Publishers (1989); T. W. Greene and P. G. M. Wuts,Protective Groups in Organic Synthesis, 3^(rd) edition, John Wiley andSons (1999); L. Fieser and M. Fieser, Fieser and Fieser's Reagents forOrganic Synthesis, John Wiley and Sons (1994); A. Katritzky and A.Pozharski, Handbook of Heterocyclic Chemistry, 2^(nd) edition (2001); M.Bodanszky, A. Bodanszky, The Practice of Peptide Synthesis,Springer-Verlag, Berlin Heidelberg (1984); J. Seyden-Penne, Reductionsby the Alumino- and Borohydrides in Organic Synthesis, 2^(nd) edition,Wiley-VCH, (1997); and L. Paquette, editor, Encyclopedia of Reagents forOrganic Synthesis, John Wiley and Sons (1995).

Salts, including pharmaceutically acceptable salts, of a compound of theinvention having a salt-forming group may be prepared in a conventionalmanner or manner known to persons skilled in the art. For example, acidaddition salts of compounds of the invention may be obtained bytreatment with an acid or with a suitable anion exchange reagent. A saltwith two acid molecules (for example a dihalogenide) may also beconverted into a salt with one acid molecule per compound (for example amonohalogenide); this may be done by heating to a melt, or for exampleby heating as a solid under a high vacuum at elevated temperature, forexample from 50° C. to 170° C., one molecule of the acid being expelledper molecule of the compound.

Acid salts can usually be converted to free-base compounds, e.g. bytreating the salt with suitable basic agents, for example with alkalimetal carbonates, alkali metal hydrogen carbonates, or alkali metalhydroxides, typically potassium carbonate or sodium hydroxide. Exemplaryand suitable salts, and their preparation, are described herein in theDefinition section of the application.

All synthetic procedures described herein can be carried out under knownreaction conditions, advantageously under those described herein, eitherin the absence or in the presence (usually) of solvents or diluents. Asappreciated by those of ordinary skill in the art, the solvents shouldbe inert with respect to, and should be able to dissolve, the startingmaterials and other reagents used. Solvents should be able to partiallyor wholly solubilize the reactants in the absence or presence ofcatalysts, condensing agents or neutralizing agents, for example ionexchangers, typically cation exchangers for example in the H⁺ form. Theability of the solvent to allow and/or influence the progress or rate ofthe reaction is generally dependant on the type and properties of thesolvent(s), the reaction conditions including temperature, pressure,atmospheric conditions such as in an inert atmosphere under argon ornitrogen, and concentration, and of the reactants themselves.

Suitable solvents for conducting reactions to synthesize compounds ofthe invention include, without limitation, water; esters, includinglower alkyl-lower alkanoates, e.g., EtOAc; ethers including aliphaticethers, e.g., Et₂O and ethylene glycol dimethylether or cyclic ethers,e.g., THF; liquid aromatic hydrocarbons, including benzene, toluene andxylene; alcohols, including MeOH, EtOH, 1-propanol, IPOH, n- andt-butanol; nitriles including CH₃CN; halogenated hydrocarbons, includingCH₂Cl₂, CHCl₃ and CCl₄; acid amides including DMF; sulfoxides, includingDMSO; bases, including heterocyclic nitrogen bases, e.g. pyridine;carboxylic acids, including lower alkanecarboxylic acids, e.g., AcOH;inorganic acids including HCl, HBr, HF, H₂SO₄ and the like; carboxylicacid anhydrides, including lower alkane acid anhydrides, e.g., aceticanhydride; cyclic, linear, or branched hydrocarbons, includingcyclohexane, hexane, pentane, isopentane and the like, and mixtures ofthese solvents, such as purely organic solvent combinations, orwater-containing solvent combinations e.g., aqueous solutions. Thesesolvents and solvent mixtures may also be used in “working-up” thereaction as well as in processing the reaction and/or isolating thereaction product(s), such as in chromatography.

Purification methods are known in the art and include, for example,crystallization, chromatography (liquid and gas phase, and the like),extraction, distillation, trituration, reverse phase HPLC and the like.Reactions conditions such as temperature, duration, pressure, andatmosphere (inert gas, ambient) are known in the art and may be adjustedas appropriate for the reaction.

The invention further encompasses “intermediate” compounds, includingstructures produced from the synthetic procedures described, whetherisolated or generated in-situ and not isolated, prior to obtaining thefinally desired compound. Structures resulting from carrying out stepsfrom a transient starting material, structures resulting from divergencefrom the described method(s) at any stage, and structures formingstarting materials under the reaction conditions are all “intermediates”included in the invention. Further, structures produced by usingstarting materials in the form of a reactive derivative or salt, orproduced by a compound obtainable by means of the process according tothe invention and structures resulting from processing the compounds ofthe invention in situ are also within the scope of the invention.

The invention also provides new starting materials and/or intermediates,as well as processes for the preparation thereof. In select embodiments,such starting materials are used and reaction conditions so selected asto obtain the desired compound(s). Starting materials of the invention,are either known, commercially available, or can be synthesized inanalogy to or according to methods that are known in the art. Manystarting materials may be prepared according to known processes and, inparticular, can be prepared using processes described in the examples.In synthesizing starting materials, functional groups may be protectedwith suitable protecting groups when necessary. Protecting groups, theirintroduction and removal are described above.

Compounds of the present invention can possess, in general, one or moreasymmetric carbon atoms and are thus capable of existing in the form ofoptical isomers as well as in the form of racemic or non-racemicmixtures thereof. While shown without respect to stereochemistry inFormulas I-III, the present invention includes such optical isomers anddiastereomers, as well as the racemic and resolved, enantiomericallypure R and S stereoisomers, as well as other mixtures of R and Sstereoisomers and pharmaceutically acceptable salts thereof.

The optical isomers can be obtained by resolution of the racemicmixtures according to conventional processes, e.g., by formation ofdiastereoisomeric salts, by treatment with an optically active acid orbase. Examples of appropriate acids are tartaric, diacetyltartaric,dibenzoyltartaric, ditoluoyltartaric, and camphorsulfonic acid and thenseparation of the mixture of diastereoisomers by crystallizationfollowed by liberation of the optically active bases from these salts. Adifferent process for separation of optical isomers involves the use ofa chiral chromatography column optimally chosen to maximize theseparation of the enantiomers. Still another available method involvessynthesis of covalent diastereoisomeric molecules by reacting compoundsof the invention with an optically pure acid in an activated form or anoptically pure isocyanate. The synthesized diastereoisomers can beseparated by conventional means such as chromatography, distillation,crystallization or sublimation, and then hydrolyzed to deliver theenantiomerically pure compound. The optically active compounds of theinvention can likewise be obtained by using optically active startingmaterials. These isomers may be in the form of a free acid, a free base,an ester or a salt. All such isomeric forms of such compounds areexpressly included in the present invention.

The compounds of the invention may also be represented in multipletautomeric forms. Tautomers often exist in equilibrium with each other,and interconvert under environmental and physiological conditions. Thecompounds of the invention may also occur in cis- or trans- or E- orZ-double bond isomeric forms. The invention expressly includes alltautomeric forms of the compounds described herein.

All crystal forms of the compounds described herein are expresslyincluded in the present invention.

The present invention also includes isotopically-labeled compounds,which are identical to those recited herein, but for the fact that oneor more atoms are replaced by an atom having an atomic mass or massnumber different from the atomic mass or mass number usually found innature. Examples of isotopes that can be incorporated into compounds ofthe invention include isotopes of hydrogen, carbon, nitrogen, oxygen,phosphorous, fluorine and chlorine, such as ²H (deuterium), ³H(tritium), ¹³C, ¹⁴C, ₁₅N, ¹⁶O, ¹⁷O, ³¹P, ³²P, ³⁵S, ¹⁸F, and ³⁶Cl.

Compounds of the present invention that contain the aforementionedisotopes and/or other isotopes of other atoms are within the scope ofthis invention. Certain isotopically-labeled compounds of the presentinvention, for example those into which radioactive isotopes such as ³Hand ¹⁴C are incorporated, are useful in drug and/or substrate tissuedistribution assays. Deuterated (²H), Tritiated (³H) and carbon-14,i.e., ¹⁴C, isotopes are particularly preferred for their ease ofpreparation and detection. Further, substitution with heavier isotopessuch as deuterium, i.e., ²H, can afford certain therapeutic advantagesresulting from greater metabolic stability, for example increased invivo half-life or reduced dosage requirements and, hence, may bepreferred in some circumstances. Isotopically labeled compounds of thisinvention can generally be prepared by substituting a readily availableisotopically labeled reagent for a non-isotopically labeled reagent.

Biological Evaluation

The compounds of the invention may be modified by appending appropriatefunctionalities to enhance selective biological properties. Thepharmacokinetic and pharmacodynamic properties of a compound relate,directly and indirectly, to the ability of the compound to be effectivefor its intended use.

Although the pharmacological properties of the compounds of theinvention (Formulas I-III) vary with structural change, in general,activity possessed by compounds of Formulas I-III may be demonstratedboth in vitro as well as in vivo. The following exemplifiedpharmacological assays have been carried out with the compoundsaccording to the invention, to assess and characterize the compound'sability to modulate BACE activity and to regulate the cleavage ofamyloid beta precursor protein, thereby reducing or inhibiting theproduction of amyloid beta.

In Vitro Enzymatic BACE FRET (Fluorescence Resonance Energy Transfer)Assay (Enzyme Assay Data in the Example Table I)

The assay buffer used in this screen is 0.05 M acetate, pH 4.2, 10% DMSOfinal, 100 uM genapol (which is a nonionic detergent, below its CriticalMicelle Concentration). The Beta Secretase enzyme (0.2 nM) ispre-incubated for one hour with inhibitors, typically in about 1 uL ofDMSO according to a serial dilution, are added thereto. This assay iseffectively started by the addition of FRET substrate (50 nM) and thecombination is incubated for one hour. The FRET assay is terminated withby addition of Tris buffer, which raises the pH to neutrality, and thefluorescence is determined. The FRET substrate is a peptide withcommercially available fluorophore and quencher, on opposite sides ofthe BACE cleavage site. Proteolytic cleavage of the FRET substratereleases quenching of fluorescence (excitation 488 nm and emission 425nm).

Where available, the in-vitro BACE FRET enzyme data for each of theExamples is provided in Table 1.

In Vitro BACE Cell-Based Assay

The cell-based assay measures inhibition or reduction of Aβ340 inconditioned medium of test compound treated cells expressing amyloidprecursor protein.

Cells stably expressing Amyloid Precursor Protein (APP) were plated at adensity of 40K cells/well in 96 well plates (Costar). The cells werecultivated for 24 hours at 37° C. and 5% CO₂ in DMEM supplemented with10% FBS. The test compounds were then added to cells in 10-point doseresponse concentrations with the starting concentration being either 100μM or 10 μM. The compounds were diluted from stock solutions in DMSO andthe final DMSO concentration of the test compounds on cells was 0.1%.After 24 h of incubation with the test compounds the supernatantconditioned media was collected and the Aβ 40 levels were determinedusing a sandwich ELISA. The IC₅₀ of the compound was calculated from thepercent of control or percent inhibition of Aβ 40 as a function of theconcentration of the test compound.

The sandwich ELISA to detect Aβ 40 was performed in 96 well microtiterplates, which were pre-treated with goat anti-rabbit IgG (Pierce). Thecapture and detecting antibody pair that were used to detect Aβ 40 fromcell supernatants were affinity purified pAb40 (Biosource) andbiotinylated 6E10 (Signet Labs Inc.), respectively. The optimalconcentration for the pAb40 antibody was 3 μg/ml in Superblock/TBS(Pierce) that was supplemented with 0.05% Tween 20 (Sigma). Optimalconcentration for the detection antibody 6E10-biotinylated was 0.5 μg/mlin Superblock/TBS (Pierce) that had been supplemented with 2% normalgoat serum and 2% normal mouse serum.

Cellular supernatants were incubated with the capture antibody for 3 hat 4° C., followed by 3 wash steps in TBS-tween (0.05%). The detectingantibody incubation was for 2 h at 4° C., again followed by the washsteps as described previously. The final readout of the ELISA isTime-Resolved Fluorescence (counts per minute) using Delfia reagentsStreptavidin-Europium and Enhancement solutions (Perkin Elmer) and theVictor 2 multilabel counter (Perkin Elmer).

Where available, the in-vitro BACE cell based data for each of theExamples is provided in Table 1.

In Vitro Enzymatic Cathepsin D (Cat D) FRET (Fluorescence ResonanceEnergy Transfer) Assay

Recombinant Cat D was expressed in CHO cells. The assay buffer forCathepsinD is 0.05 M citrate pH 3.5, 10% DMSO final, 5 mM CHAPS. The CatD enzyme (9 nM) is pre-incubated for one hour with inhibitors, typicallyin about 1 uL of DMSO according to a serial dilution, is added thereto.The assays are effectively started by the addition of different FRETsubstrates (20 nM for Cat D) and the combination is incubated for onehour. The FRET assay is terminated with by addition of Tris buffer,which raises the pH to neutrality, and the fluorescence is determined.The FRET substrate is a peptide with commercially available fluorophoreand quencher, on opposite sides of the BACE cleavage site. The Cat Dsubstrate peptide sequence is based on sequence #1 of Table 1 fromGulnik et al. FEBS Letters v413 p 379-384 1997. Proteolytic cleavage ofthe FRET substrate releases quenching of fluorescence (Cat D excitation500 nm and emission 580 nm).

Alternatively, a Cat D assay may also be run according to the proceduredescribed in the article, Characterization of new fluorgenic substratesfor the rapid and sensitive assay of cathepsin E and cathepsin D, J.Biochem., 125:1137, 1999. In addition, the cathepsin D and cathepsin Eassays are described in PCT publication WO2011069934. This WIPOpublication describes BACE inhibitor compounds having an amide linkerconnecting two aromatic groups with extremely poor cathepsin D and/orcathepsin E inhibitory activity (see Table 2 (?)).

Where available, the in-vitro Cat D FRET assay data for each of theExamples, conducted by the first procedure, is provided. For example,the compound of example 43 has a Cat D IC₅₀ value of >400 uM. As shownby the high micromolar Cat D data (very poorly active or inactiveagainst cat D), the compounds of the present invention possess theunexpected property of little to no ability to inhibit the activity ofCat D. It was surprisingly found that incorporation of an amino- oramido-linker between the core of the compounds and the R⁷ and R⁹ groups,respectively, has conferred a significantly reduced, poor or no potencyon the protein Cat D. Thus, with this surprising selectivity profile,the compounds of the present invention are believed to minimize, reduceor completely eliminate any risk of retinal atrophy and abnormaldevelopment of the eye and of the retinal pigmented epithelium as itrelates to the normal function and activity of Cat D.

In vivo Inhibition of Beta-Secretase

Several animal models, including mouse, rat, dog, and monkey, may beused to screen for inhibition of beta-secretase activity in vivofollowing administration of a test compound sample. Animals used in thisinvention can be wild type, transgenic, or gene knockout animals. Forexample, the Tg2576 mouse model, prepared and conducted as described inHsiao et al., 1996, Science 274, 99-102, and other non-transgenic orgene knockout animals are useful to analyze in vivo inhibition ofAmyloid beta peptide (Abeta) production in the presence of inhibitorytest compounds. Generally, 2 to 18 month old Tg2576 mice, gene knockoutmice or non-transgenic animals are administered test compoundsformulated in vehicles, such as cyclodextran, phosphate buffers,hydroxypropyl methylcellulose or other suitable vehicles. One totwenty-four hours following the administration of compound, animals aresacrificed, and brains as well as cerebrospinal fluid (CSF) and plasmaare removed for analysis of A-beta levels and drug or test compoundconcentrations (Dovey et al., 2001, Journal of Neurochemistry, 76,173-181) Beginning at time 0, animals are administered by oral gavage,or other means of delivery such as intravenous injection, an inhibitorytest compound of up to 100 mg/kg in a standard, conventionalformulation, such as 2% hydroxypropyl methylcellulose, 1% Tween80. Aseparate group of animals receive 2% hydroxypropyl methylcellulose, 1%Tween80 alone, containing no test compound, and serve as avehicle-control group. At the end of the test period, animals aresacrificed and brain tissues, plasma or cerebrospinal fluid arecollected. Brains are either homogenized in 10 volumes (w/v) of 0.2%diethylamine (DEA) in 50 mM NaCl (Best et al., 2005, Journal ofPharmacology and Experimental Therapeutics, 313, 902-908), or in 10volumes of 0.5% TritonX-100 in Tris-buffered saline (pH at about 7.6).Homogenates are centrifuged at 355,000 g, 4° C. for 30 minutes. CSF orbrain supernatants are then analyzed for the presence of A-beta peptideby specific sandwich ELISA assays based on ECL(Electrochemiluminescence) technology. For example, rat Abeta40 ismeasured using biotinylated-4G8 (Signet) as a capture antibody and Fab40(an in-house antibody specific to the C-terminal of Abeta40) as adetection antibody. For example, 4 hours after administration of 30mg/kg oral dose of the test compound in 2% hydroxypropylmethylcellulose, 1% Tween80 (pH2.2) to 200 g male Sprague Dawley rats,amyloid beta peptide levels are measured for reduction by X % and Y % incerebrospinal fluid and brain, respectively, when compared to the levelsmeasured in the vehicle-treated or control mice.

Actual vehicles used: Oral: 2% HPMC, 1% Tween80, pH 2.2

-   -   IV: 5% EtOH, 45% Propylene glycol in 5% Dextrose

The compounds of the invention may be shown to reduce the formationand/or deposition of amyloid beta peptide in the cerebrospinal fluid(CSF) as well as in the brain of a mouse or rat at either 3mpk, 10 mpkor 30 mpk (mpk=mg compound per kg weight of the animal) dosingconcentrations after 4 hrs. The following examples exhibited thefollowing percent Abeta 40 reductions at 10 mpk (unless otherwise noted)in the CSF and brain of the rat, respectively.

% reduction % reduction of rat CSF of rat brain levels at levels at Ex.No. 10 pmk 10 mpk 127 67 50 320 82 (at 30 mpk) 62 (at 30 mpk) 320 66 46117 78 71 228 54 33 76 64 60 229 41 8 77 78 71 192 81 71 71 80 73 193 7567 96 24 1 95 82 77 199 62 42 163 33 14 74 56 46 113 65 58 70 65 51 23772 67 174 46 26 44 80 73 45 31 6 283 75 69 238 8 16 281 70 72 93 76 8399 63 58 43 70 59 283 61 (3 mpk) 44 (3 mpk) 162 11 −7 77 66 (3 mpk) 46(3 mpk) 44 69 (3 mpk) 52 (3 mpk) 281 55 (3 mpk) 34 (3 mpk) 66 59 42 16760 41 306 13 −1 391 54 24 388 21 4 130 49 23 312 30 −1 267 −1 11 302 379 303 57 50 304 41 20 419 57 42 90 48 31 415 27 14 390 71 54 299 74 62

Indications

According to the amyloid cascade hypothesis, cerebral deposition ofamyloid-beta peptide (Aβ) is critical for Alzheimer's disease (AD)pathogenesis. Aβ generation is initiated when β-secretase (BACE1)cleaves the amyloid precursor protein. De Meyer et al re-affirm thebelieved role which the accumulation of beta-amyloid protein (A-beta) incerebral spinal fluid (CSF) in a subject plays in the progression ofsymptoms, initially revealed as mild cognitive impairment, whichultimately leads to AD. Arch Neurol. 67(8):949-956, 2010. Amyloid-b (Ab)peptides generated from amyloid precursor protein (APP) by proteolyticcleavage, such as by aspartyl protease enzymes including beta-secreatase(BACE) and gamma-secretase, likely play a causal role in AD pathogenesis(Tanzi and Bertram, Cell, (120): 545-555, 2005; Walsh and Selkoe,Neuron, (44): 181-193, 2004). Although the precise mechanisms of Abtoxicity are unclear, oligomeric forms of Ab may contribute to cognitivedecline by altering synaptic structure and function (Palop and Mucke,Nat. Neuroscience, (13): 812-818, 2010; Selkoe, Behavioral Brain Res.,(192): 106-113, 2008; Shankar et al., Nat. Medicine (14): 837-842,2008). Transgenic mouse models that overexpress mutant APP and producehigh levels of Ab show amyloid plaque deposition, synaptic deficits,learning and memory impairments, and other behavioral abnormalities(Games et al., Nature, (373): 523-527, 1995; Götz et al., MolecularPsychiatry (9): 664-683, 2004; Hsia et al., Proc. Natl. Academy ofScience USA (96): 3228-3233, 1999; Hsiao et al., Science (274): 99-102,1996, citing Harris et al, Neuron (68): 428-441, 2010).

For more than a decade, BACE1 has been a prime target for designingdrugs to prevent or treat AD. However, development of such agents hasturned out to be extremely challenging, with major hurdles in cellpenetration, oral bioavailability/metabolic clearance, and brain access.

MK-8931, a small molecule inhibitor of BACE (structure unknown) wastested in a two-part randomised, double-blind, placebo-controlled phase1 clinical trial in 88 healthy individuals (18-45 years old). MK-8931seemed to be generally well tolerated (66 patients), and no seriousadverse events were reported. A major goal of the trial was to determinewhether MK-8931 was able to enter the brain and block β secretase. Tomonitor this, biomarkers of BACE1 activity in the CSF were measured,including Aβ40 and Aβ42, as was soluble peptide APP (sAPPβ), a directproduct of BACE1 cleavage of APP. MK-8931 significantly reduced CSF Aβconcentrations in a sustained and dose-dependent manner. At 36 hpost-dose, a single dose of 100 mg reduced CSF Aβ40 concentrations by75% and a single dose of 550 mg by 92%. Similar reductions of CSFconcentrations of Aβ42 and sAPPβ, the BACE1-cleaved ectodomain of APP,were also observed. Vassar & Yan, Lancet Neurology, 13:319-329 (2014).Currently, MK-8931 is enrolling mild-to-moderate Alzheimer's Diseasepatients in a Ph 2/3 trial; and enrolling participants with prodomalAlzheimer's disease in a Ph III safety and efficacy trial. (US clinicaltrials; Merck Newsroom, 2014).

Bapineuzamab, a monoclonal amino-terminus specific anti-amyloid antibodyis presently in Phase III clinical trials for the treatment of AD.Alzheimer's Research & Therapy, 1:2, 2009. Each of the known geneticcauses of AD is linked to A-beta. Dementia, Down's Syndrome to APPover-production, are all believed to be linked to the deposition ofA-beta on the brain. With methods for identifying brain amyloiddeposition, positron emission scanning (PET) and CSF measurements ofAb42, identification of AD suffering individuals needing treatment isbecoming easier and more common. It is firmly believed that by reducingthe formation of A-beta, one can begin to pre-treat AD. Vassar et al,Journal of Neuroscience, 29 (41):12787-12794, 2009. One publishedpathway for treatment of AD is inhibition of beta-secretase. Tirrell,Bloomberg News, The Boston Globe, Jan. 7, 2010.

The US biotech company CoMentis is developing an orally bioavailablesmall molecule CTS-21166, a highly potent, highly selective andefficacious brain-penetrating beta-secretase inhibitor. CoMentissuccessfully completed a Phase I study of CTS-21166 in healthyvolunteers in 2008. Results indicated that CTS-21166 was safe,well-tolerated and pharmacodynamically active at all dose levels. Allclinical subjects administered CTS-21166 showed area-under-curve (AUC)reduction in plasma A-Beta40 reductions ranging from 40-75%. Because ofthe urgent need for AD treatment, Phase II studies for CTS-2166 areplanned, or ongoing, for AD patients. In preclinical studies, CTS-21166exhibits excellent efficacy, selectivity, brain penetration andpharmacologic activity.

Using a fragment-based chemistry strategy, Eli Lilly and companygenerated LY2811376[(S)-4-(2,4-difluoro-5-pyrimidin-5-yl-phenyl)-4-methyl-5,6-dihydro-4H-[1,3]thiazin-2-ylamine],an orally available non-peptidic BACE1 inhibitor that produces profoundAβ-lowering effects in animals. The biomarker changes obtained inpreclinical animal models translate into man at doses of LY2811376 thatwere safe and well tolerated in healthy volunteers (US Ph I Clinicaltrial—www.clinicaltrials.gov). Prominent and long-lasting Aβ reductionsin lumbar CSF were measured after oral dosing of 30 or 90 mg ofLY2811376. This represents the first translation of BACE1-drivenbiomarker changes in CNS from preclinical animal models to man. Becauseof toxicology findings identified in longer-term preclinical studies,this compound is no longer progressing in clinical development. However,BACE1 remains a viable target because the adverse effects reported herewere recapitulated in LY2811376-treated BACE1 KO mice and thus areunrelated to BACE 1 inhibition. The magnitude and duration of central Aβreduction obtainable with BACE1 inhibition positions this protease as atractable small-molecule target through which to test the amyloidhypothesis in man. Neuroscience, 31(46):16507-16515, 2011

The compounds of the invention have been shown to modulate, andspecifically inhibit the activity of the beta-secretase enzyme, therebyreducing the A-beta peptide fragments. Accordingly, compounds of theinvention are useful for, but not limited to, the prevention ortreatment of beta-secretase related diseases, including Alzheimer'sdisease. The compounds of the invention have the ability to modulate theactivity of beta secretase enzyme, thereby regulating the production ofamyloid beta (Abeta peptide) and reducing the formation and depositionof Abeta peptide in both the cerebral spinal fluid as well as in thebrain, resulting in a decrease of amyloid plaque on the brain. In oneembodiment of the invention, there is provided a method of treating adisorder related to a beta-secretase enzyme in a subject, the methodcomprising administering to the subject an effective dosage amount of acompound of Formulas I, II, III, and sub-formulae thereof. In anotherembodiment, there is provided a method of reducing production of amyloidbeta, and of reducing plaque formation on the brain. In anotherembodiment, there is provided a method for the treatment, prevention oramelioration of a disease or disorder characterized by the elevatedbeta-amyloid deposits or beta-amyloid levels in a subject, the methodcomprising administering to the subject a therapeutically effectiveamount of a compound according to any of Formulas I—III. In yet anotherembodiment, the invention provides a method of treating Alzheimer'sdisease, cognitive impairment including mild, moderate and/or severe,Down's Syndrome, cognitive decline, senile dementia, cerebral amyloidangiopathy or a neurodegenerative disorder.

Accordingly, the compounds of the invention would be useful in therapyas CNS agents in treating neurological disorders and related conditionsin subjects.

In one embodiment, the compounds of the invention are provided for themanufacture of a medicament, or a pharmaceutical composition, for thetherapeutic and/or prophylactic treatment of diseases and disorderscharacterized by elevated levels of β-amyloid and/or β-amyloid oligomersand/or b-amyloid plaques and further deposits, including Alzheimer'sDisease. In another embodiment, the invention provides compounds, ineffective dosage amounts, for the therapeutic and/or prophylactictreatment of AD. Thus, the compounds of the invention may be used totreat prodromol patients, i.e., subjects exhibiting the biomarkersand/or hallmarks of developing AD.

Besides being useful for human treatment, the compounds of the inventionmay be useful for veterinary treatment of companion animals, exoticanimals and farm animals, including mammals, rodents, and the like. Forexample, animals including horses, dogs, and cats may be treated withcompounds provided herein.

Formulations and Method of Use

Treatment of diseases and disorders herein is intended to also includetherapeutic administration of a compound of the invention, or apharmaceutical salt thereof, or a pharmaceutical composition of eitherto a subject (i.e., an animal, preferably a mammal, most preferably ahuman) which may be in need of preventative treatment, such as, forexample, for pain, inflammation and the like. Treatment also encompassesprophylactic administration of a compound of the invention, or apharmaceutical salt thereof, or a pharmaceutical composition of eitherto a subject (i.e., an animal, preferably a mammal, most preferably ahuman). Generally, the subject is initially diagnosed by a licensedphysician and/or authorized medical practitioner, and a regimen forprophylactic and/or therapeutic treatment via administration of thecompound(s) or compositions of the invention is suggested, recommendedor prescribed.

The amount of compound(s) which is/are administered and the dosageregimen for treating neurological disorders and beta-secretase mediateddiseases with the compounds and/or compositions of this inventiondepends on a variety of factors, including the age, weight, sex andmedical condition of the subject, the type of disease, the severity ofthe disease, the route and frequency of administration, and theparticular compound employed. Thus, the dosage regimen may vary widely,but can be determined routinely using standard methods. A daily dose ofabout 0.01 to 500 mg/kg, advantageously between about 0.01 and about 50mg/kg, more advantageously about 0.01 and about 30 mg/kg, and even moreadvantageously between about 0.1 and about 10 mg/kg body weight may beappropriate, and should be useful for all methods of use disclosedherein. The daily dose can be administered in one to four doses per day.

While it may be possible to administer a compound of the inventionalone, in the methods described, the compound administered normally willbe present as an active ingredient in a pharmaceutical composition.Thus, in another embodiment of the invention, there is provided apharmaceutical composition comprising a compound of this invention incombination with a pharmaceutically acceptable excipient, which includesdiluents, carriers, adjuvants and the like (collectively referred toherein as “excipient” materials) as described herein, and, if desired,other active ingredients. A pharmaceutical composition of the inventionmay comprise an “effective amount” of a compound of the invention or an“effective dosage amount” of a compound of the invention. An “effectivedosage amount” of a compound of the invention includes an amount lessthan, equal to or greater than an effective amount of the compound. Forexample, a pharmaceutical composition in which two or more unit dosages,such as in tablets, capsules and the like, are required to administer aneffective amount of the compound, or alternatively, a multi-dosepharmaceutical composition, such as powders, liquids and the like, inwhich an effective amount of the compound is administered byadministering a portion of the composition.

The compound(s) of the present invention may be administered by anysuitable route, preferably in the form of a pharmaceutical compositionadapted to such a route, and in a dose effective for the treatmentintended. The compounds and compositions of the present invention may,for example, be administered orally, mucosally, topically, rectally,pulmonarily such as by inhalation spray, or parentally includingintravascularly, intravenously, intraperitoneally, subcutaneously,intramuscularly intrasternally and infusion techniques, in dosage unitformulations containing conventional pharmaceutically acceptablecarriers, adjuvants, and vehicles.

For oral administration, the pharmaceutical composition may be in theform of, for example, a tablet, capsule, suspension or liquid. Thepharmaceutical composition is preferably made in the form of a dosageunit containing a particular amount of the active ingredient. Examplesof such dosage units are tablets or capsules. For example, these maycontain an amount of active ingredient from about 1 to 2000 mg,advantageously from about 1 to 500 mg, and typically from about 5 to 150mg. A suitable daily dose for a human or other mammal may vary widelydepending on the condition of the patient and other factors, but, onceagain, can be determined using routine methods and practices.

For therapeutic purposes, the active compounds of this invention areordinarily combined with one or more adjuvants or other “excipients”appropriate to the indicated route of administration. If orallyadministered on a per dose basis, the compounds may be admixed withlactose, sucrose, starch powder, cellulose esters of alkanoic acids,cellulose alkyl esters, talc, stearic acid, magnesium stearate,magnesium oxide, sodium and calcium salts of phosphoric and sulfuricacids, gelatin, acacia gum, sodium alginate, polyvinylpyrrolidone,and/or polyvinyl alcohol, to form the final formulation. For example,the active compound(s) and excipient(s) may be tableted or encapsulatedby known and accepted methods for convenient administration. Examples ofsuitable formulations include, without limitation, pills, tablets, softand hard-shell gel capsules, troches, orally-dissolvable forms anddelayed or controlled-release formulations thereof. Particularly,capsule or tablet formulations may contain one or morecontrolled-release agents, such as hydroxypropylmethyl cellulose, as adispersion with the active compound(s).

Formulations for parenteral administration may be in the form of aqueousor non-aqueous isotonic sterile injection solutions or suspensions.These solutions and suspensions may be prepared from sterile powders orgranules using one or more of the carriers or diluents mentioned for usein the formulations for oral administration or by using other suitabledispersing or wetting agents and suspending agents. The compounds may bedissolved in water, polyethylene glycol, propylene glycol, ethanol, cornoil, cottonseed oil, peanut oil, sesame oil, benzyl alcohol, sodiumchloride, tragacanth gum, and/or various buffers. Other adjuvants andmodes of administration are well and widely known in the pharmaceuticalart. The active ingredient may also be administered by injection as acomposition with suitable carriers including saline, dextrose, or water,or with cyclodextrin (ie. Captisol), cosolvent solubilization (ie.propylene glycol) or micellar solubilization (ie. Tween 80).

The sterile injectable preparation may also be a sterile injectablesolution or suspension in a non-toxic parenterally acceptable diluent orsolvent, for example as a solution in 1,3-butanediol. Among theacceptable vehicles and solvents that may be employed are water,Ringer's solution, and isotonic sodium chloride solution. In addition,sterile, fixed oils are conventionally employed as a solvent orsuspending medium. For this purpose any bland fixed oil may be employed,including synthetic mono- or diglycerides. In addition, fatty acids suchas oleic acid find use in the preparation of injectables.

The active ingredient may also be administered by injection as acomposition with suitable carriers including saline, dextrose, or water.The daily parenteral dosage regimen will be from about 0.1 to about 30mg/kg of total body weight, and preferably from about 0.1 to about 10mg/kg.

For pulmonary administration, the pharmaceutical composition may beadministered in the form of an aerosol or with an inhaler including drypowder aerosol.

The pharmaceutical compositions may be subjected to conventionalpharmaceutical operations such as sterilization and/or may containconventional adjuvants, such as preservatives, stabilizers, wettingagents, emulsifiers, buffers etc.

Tablets and pills can additionally be prepared with enteric coatings.Such compositions may also comprise adjuvants, such as wetting,sweetening, flavoring, and perfuming agents. Accordingly, in yet anotherembodiment of the present invention, there is provided a method ofmanufacturing a medicament, the method comprising combining an amount ofa compound according to Formulas I-III with a pharmaceuticallyacceptable carrier to manufacture the medicament.

In yet another embodiment, the invention provides a method ofmanufacturing a medicament for the treatment of Alzheimer's disease, themethod comprising combining an amount of a compound according toFormulas I-III with a pharmaceutically acceptable carrier to manufacturethe medicament.

Combinations

While the compounds of the invention can be dosed or administered as thesole active pharmaceutical agent, they can also be used in combinationwith one or more compounds of the invention or in conjunction with otheragents. When administered as a combination, the therapeutic agents canbe formulated as separate compositions that are administeredsimultaneously or sequentially at different times, or the therapeuticagents can be given as a single composition.

The phrase “co-therapy” (or “combination-therapy”), in defining use of acompound of the present invention and another pharmaceutical agent, isintended to embrace administration of each agent in a sequential mannerin a regimen that will provide beneficial effects of the drugcombination, and is intended as well to embrace co-administration ofthese agents in a substantially simultaneous manner, such as in a singlecapsule having a fixed ratio of these active agents or in multiple,separate capsules for each agent.

Specifically, the administration of compounds of the present inventionmay be in conjunction with additional therapies known to those skilledin the art in the prevention or treatment of beta-secretase,gamma-secretase and/or other reagents known in influence the formationand/or deposition of amyloid beta, otherwise responsible for theformation of plaque on the brain.

If formulated as a fixed dose, such combination products employ thecompounds of this invention within the accepted dosage ranges. Compoundsof Formulas I, II and III may also be administered sequentially withother known medicinal agents. The invention is not limited in thesequence of administration; compounds of the invention may beadministered either prior to, simultaneous with or after administrationof the known anti-inflammatory agent.

The foregoing description is merely illustrative of the invention and isnot intended to limit the invention to the disclosed compounds,compositions and methods. Variations and changes, which are obvious toone skilled in the art, are intended to be within the scope and natureof the invention, as defined in the appended claims. From the foregoingdescription, one skilled in the art can easily ascertain the essentialcharacteristics of this invention, and without departing from the spiritand scope thereof, can make various changes and modifications of theinvention to adapt it to various usages and conditions. All patents andother publications recited herein are hereby incorporated by referencein their entireties.

1.-60. (canceled)
 61. A compound of formula

or a pharmaceutically acceptable salt thereof.
 62. A pharmaceuticalcomposition comprising the compound of claim 61 and a pharmaceuticallyacceptable excipient.
 63. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 61. 64. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 61. 65. A compound of formula

or a pharmaceutically acceptable salt thereof.
 66. A pharmaceuticalcomposition comprising the compound of claim 65 and a pharmaceuticallyacceptable excipient.
 67. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 65. 68. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 65. 69. A compound of formula

or a pharmaceutically acceptable salt thereof.
 70. A pharmaceuticalcomposition comprising the compound of claim 69 and a pharmaceuticallyacceptable excipient.
 71. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 69. 72. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 69. 73. A compound of formula

or a pharmaceutically acceptable salt thereof.
 74. A pharmaceuticalcomposition comprising the compound of claim 73 and a pharmaceuticallyacceptable excipient.
 75. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 73. 76. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 73. 77. A compound of formula

or a pharmaceutically acceptable salt thereof.
 78. A pharmaceuticalcomposition comprising the compound of claim 77 and a pharmaceuticallyacceptable excipient.
 79. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 77. 80. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 77. 81. A compound of formula

or a pharmaceutically acceptable salt thereof.
 82. A pharmaceuticalcomposition comprising the compound of claim 81 and a pharmaceuticallyacceptable excipient.
 83. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 81. 84. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 81. 85. A compound of formula

or a pharmaceutically acceptable salt thereof.
 86. A pharmaceuticalcomposition comprising the compound of claim 85 and a pharmaceuticallyacceptable excipient.
 87. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 85. 88. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 85. 89. A compound of formula

or a pharmaceutically acceptable salt thereof.
 90. A pharmaceuticalcomposition comprising the compound of claim 89 and a pharmaceuticallyacceptable excipient.
 91. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 89. 92. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 89. 93. A compound of formula

or a pharmaceutically acceptable salt thereof.
 94. A pharmaceuticalcomposition comprising the compound of claim 93 and a pharmaceuticallyacceptable excipient.
 95. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 93. 96. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 93. 97. A compound of formula

or a pharmaceutically acceptable salt thereof.
 98. A pharmaceuticalcomposition comprising the compound of claim 97 and a pharmaceuticallyacceptable excipient.
 99. A method of reducing beta amyloid peptidelevels in the cerebral spinal fluid of a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim
 97. 100. A method of treating Alzheimer's disease, cognitiveimpairment or a combination thereof in a subject, the method comprisingadministering to the subject an effective dosage amount of the compoundof claim 97.